Mac audio mpx 2000 review
It can put out more than watts of power and comes with a large heat sink for cooling that Apple says will allow the device to "run fully unconstrained all the time. There's a 3. That's a lot! Apple says the card can push more than W of power. Missing in all of this is any word on Nvidia GPU support, though. The company is promoting video editing performance in particular, touting a new video card called "Afterburner" that Apple claims can decode more than 6 billion pixels per second.
The system runs on a 1. But behind its aluminum grille are three large fans at the front of the device. There is a blower as well, though Apple claims the device won't be any louder than an iMac Pro when it's up and running. You must login or create an account to comment. Skip to main content.
Mac Audio MPX 5000
Though Apple promises it will run quiet, the new Mac Pro offers plenty of power. And if you want to move your new Mac Pro around, it comes with its own set of wheels. It's easy on the ears, and I never 'tired' or found the sound irritating. If its close cousins of the time, some of the Rotel line, sound like this, there may be a whole new line of sparrow feed.
Frequency response is quite accurate through the upper midrange, neither lacking in nor having the bass boosted, though some seem to like the latter. I can only fault the early roll-off on the upper end. I should add that I did not try to adjust it out through the uncommon adjustable low-pass filter this tuner uses.
There's probably a trade-off between blocking the pilot as well as it is and losing a little of the top end of hearable audio. This tuner sounds and has a sensitivity pattern a lot like the Mitsubishi DA-F I'd also compare it closely to some of the Sansui tuners of its time. The AN outputs the signal at unity to a slight gain only. One thing that probably was not cheaper for the manufacturer was the use of all Nichicon caps, save for a few styrenes used in the audio stage. For once I can say I think the noise reduction actually works, in particular on quieter signals. I have a hard time quantifying it with my ears but the scope says there's a difference.
In total, the combination of bufferless output, noise reduction and discrete components where used are responsible for the good sound. The addition of a handful of quality caps in the audio section and perhaps a filter adder board in the IF ought to make this into a much better tuner. In the negative column -- perhaps due to age, perhaps due to inexpensive design -- this unit seems to have quirks with the control of tuning and with cold solder joints. Automatic tuning will occasionally lock up at the top end of the dial rather than either coming around to the low end or just stopping.
The cure is easy enough, though -- only resetting powering off the unit. This does not happen under manual tuning so it is either an aged chip or a design issue. Someone had mentioned thinking the sideboards were solid teak, but my nose tells me they're solid walnut. My initial impression was that this is a pretty good-sounding model. Compared to the recently auditioned Denon TU, the T7 is quieter and a bit more selective. The front-panel layout is clean -- some might say spartan.
The T7 tunes in kHz increments and its digital display includes a center-tune indicator similar to the Mitsubishi DA-F20's.
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The T7 images well with good separation, frequency extremes are more than acceptable, long-term listening is comfortable with no apparent brightness, and it has decent-but-not-great bass. The remote provides only band selection, tuning and preset selection. Power On and preset programming still have to be done at the tuner itself. In comparison, the T7 makes the Denon TU appear downright crowded, and the is an empty box. The T7's tuner board, which includes the power supply rectification, measures a little over 6 x 4 inches.
The tuner appears to be well made, with a double-sided board, glass substrate, polystyrenes in the de-emphasis, and through hole plating for the components, which may halt any thought of ever modding the T7. The Mitsumi front end is a 4 gang thanks Jov and Don equivalent varactor, followed by a 3 ceramic filter IF strip.
There is a 7a version of this tuner but I haven't had the opportunity to pull a cover and see what changes were implemented there. Usually on most tuner front ends there are as many adjustment caps as there are adjustable coils, one pair of each for each gang. This means alignment may be somewhat compromised on the ends of the FM band, as you are forced to make all adjustments mid-band at 98 MHz in this case, where you have only coils to adjust and adjustment is by bending.
Aragon 4T2 search eBay The 4T2 is a very rare tuner that was seldom seen in the secondary market until an eBay seller sold off a large stash of "new old stock" pieces in , and some of those same units have been in circulation since. Please post in our FMtuners group if you have any information about the 4T2. We're tracking eBay sale prices for a couple of them in the On-Deck Circle. The MkII has some additional features for other dbx components, such as remote control link, and also includes a frequency step adjustment that the T lacks.
Some specs on the T are: usable sensitivity 9. Listening impressions: this is a very quiet tuner. A very well-balanced soundstage that extends beyond the speakers, with a slight forward character.
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Deep bass with smooth extended highs. A very natural, dynamic sound. I very much prefer it to the Kenwood Basic T-2, which has a more laidback, reserved sound, with a slightly less punchy bass. The T in Narrow sounds similar to the Kenwood in Wide. Maybe the Kenwood needs an alignment. It also has scan up and down and a center tuning meter with opposing arrows red and a green indicator that lets you know you're locked on.
It incorporates auto IF switching that can be overridden but only to the narrow position, very odd. The good news is that the tuner always seems to choose the right setting for lowest distortion and noise. The switchable Schotz noise reduction circuit works well - I usually leave it on, as it only comes into play with signal levels less than 55 dBf.
Very easy to use, with little fiddling required. The AM section is a bit of a disappointment. Although it has a very extended range, it seems to be susceptible to electrical interference in the house, whereas the Kenwood is extremely quiet and sensitive as well. The T appears to be a great value at current prices. I can't attest to DX capabilities, since I only use a deck-mounted dipole antenna, which works well for me for now. Please post in our FMtuners group if you can tell us about it. Here's a review of the TE from Audio magazine. Our contributors Tim and Ann warn, "We subscribe to most of the major UK publications and virtually all of them have noted serious reliability problems with this model.
The specific problem these magazines noted was a logic board failure and once this board failed, the tuner ceased to function. And these boards are no longer available. Audiophonics ST search eBay Please post in our FMtuners group if you have any information about this scarce tuner. It sometimes sells for high prices, presumably because buyers are confusing it with something else. All we know is that it has 3 gangs for FM and 2 for AM, certainly not what you'll find in a top tuner.
Signature 22 MTK
Please post in our FMtuners group if you have any information about it. Audiosource search eBay Please post in our FMtuners group if you have any information about any Audiosource tuner. We're tracking eBay sale prices for a few of them in the On-Deck Circle.
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Ed says the TS's "ergonomics left a lot to be desired, but it performed superbly with some basic mods. This buffer has no negative supply. All in all, a valiant attempt at good sound in a small package and fairly successful, IMO. Tuning down the dial is very slow but eight stations can be stored in presets. Burmester search eBay Here's a review of this rare German tuner by our contributor Jov: "The , an FM-only tuner, was sold from to It features a machined 7 mm thick machined and polished stainless steel front panel that weighs 1.
The tuning knob, also made of machined stainless steel, weighs gm, giving it that nice flywheel effect. The rest of the chassis is made of anodized black aluminum panels held with Allen screws. With the exception of the antenna and RF module, the remaining boards employ plated-through hole double-sided FR4 material with red solder mask. Most of the modules are separated by steel walls, with the RF module fully encased in a steel shield.
The main control is located behind the faceplate away from the noise-sensitive areas. The power supply sits behind the main control with its own steel shield. Antenna input B has a 10 dB pad. The mixer used BJTs configured as a balanced mixer. The has only one IF bandwidth kHz. Tuning step is selectable between 10 kHz and 50 kHz. Going from the lowest band to the highest band is quick using the heavy tuning knob.
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Signal strength is done via step LED display. Memory station backup is through a lithium cell held on a holder. This is a nice feature and allows the end user to replace the worn cell without any soldering. There is a remote control option for the Without the DYNAS installed as an option, depressing the button will mute the audio as it engages to something that isn't present :.
The MPX outputs goes through the pilot and subcarrier notch filters, then to two pairs of discrete DC-coupled buffers. There are 4x film capacitors and no electrolytics used for audio coupling located at the MPX input and outputs, respectively. The audio outputs support both balanced and unbalanced configurations. One thing that is interesting was that most of the discrete part numbers on the DC buffer area had been sanded off.
It doesn't take that much effort to figure exactly what they are. The newer Burmester was a lot worse in this regard -- all the IC part numbers were sanded off, including the 3-pin IC regulators! The is not as good as the in terms of sound. The FM tuner is our flagship product in the tuner market. Even in comparison with its already legendary predecessor, the , the offers further dramatic improvement in sound quality. The German magazine Audio called it "divine" and uses it as reference tuner.
Why offer an FM tuner of this quality and price level in a restless world dominated by digital audiosystems? A justified question - but then, think about those constantly changing digital recording and broadcasting standards, some of which have been much-touted but long in coming and some of which have already disappeared again, such as the DSR standard.
In the final analysis only an FM tuner offers unrestricted access to the virtually unlimited supply of recorded music broadcast by radiostations. The also proves convincingly that the perfect reception of an FM station via cable can be an exhilarating musical experience.
With its totally re-designed Burmester front end, the offers a sound quality and musical enjoyment never before heard from FM broadcasts. The front end has been completely developed in-house through intensive research and built with only highest-quality parts. Using our own technology we were able to realize the excellent-sounding wide-IF solution with kHz bandwidth.
The is available in two models: As Top Line Tuner in our top line housing with a mm wide front panel and as Reference Tuner with a mm wide front panel in our extremely sophisticated reference housing. Both are characterized by clean design, high-grade material and excellent Burmester-typical uncompromising manufacturing quality. Wide IF: Bandwidth app. Narrow IF: Bandwidth app. Functions: RDS station display; numerical buttons for direct-dialling of frequencies or preset stations; 60 preset stations; display-off switch; signal-strength indicator with eight LEDs; narrow IF; two parallel antenna inputs as standard optional: one input with attenuation step ; infrared remote control for preset stations; mono setting.
Our panelist Jim got to play with one and ranked the sound of that sample in comparison to many top tuners on our Shootouts page. The PSB is extremely rare and is seldom offered for sale on eBay and other sites. The tuner itself was very sensitive and OK for overload not great and so-so for selectivity unless you replaced most of the filters. Problem was that replacing the filters made the S-meter useless it always showed full scale or close to it.
Also, it had a ton of front-panel presets. I sold mine when I moved under the transmitters in Hartford as it just couldn't handle the overload. All Sonic Improvements. Our contributor Noel reports: "I talked to the Carver people about the differences between the various TXs. What a difference. It pulled in that station nearly noise-free and when pressing in the multipath noise limiter it's as clean as new linen, without killing the stereo separation.
It's one quiet tuner and it looks good too. Critics say the sound is mediocre -- I say it sounds great and crisp. See our contributor Noel's comment in the TXa review above. Here's our panelist Ray's report: "The TXb has been great fun to play with. Now, having spent some quality time with it, I cannot understand why the FMtuners group hasn't heard all that much about this thing - it's really sweet. Man that hurt! A brief report: FM circuit highlights : RF lineup: Single tuned - dual gate amp - quadruple tuned - mixer. Yup, 6-ganger.
LA detector IC. LC output buffer IC. Yup, 3-ganger. IF lineup: Wide: amp - LC - amp - detector. AM performance and sound are also pretty special but in Wide mode it lets in adjacent stations. Two complaints: At its price Carver should have added a digital signal-strength meter, and the gray letters and numbers on the black dashboard are very difficult to read. Come on Carver, white, hunh? Still, ol' RFM really likes this Carver creation and it has found a spot both in his rack and in his heart.
No surprise here as the results were very good. The -3 dB point was Hz giving a time constant of The tuner's audio signal output polarity is in phase with that received but is flipped at the detector out. I see no reason to add a detector out jack to this tuner. The Carver's wide bandwidth, even in Narrow mode, lets in adjacents too much, especially at night when all signals are strong. The upside, of course, is that when not interfered with the sound is very good, even pushing FM on local or clear channel stations.
Sensitivity is excellent and the Carver noise reduction circuitry is second to none, at least for any tuner I own or have directly listened to. Sound quality is not in my top 5, but certainly in my top 10 list. Now for the real reason for this report: The AM sound quality on the TXb is absolutely the best of any tuner I own. My town has a decent oldies Top 40 station, WPDC, yet I rarely listen to this station on the FM tuners I have with supposedly good AM tuners because the sound quality is only a couple of steps above what you can hear over the phone line. The audio bandwidth of these tuners is just too narrow.
Well, not so with the TXb - in Wide mode it sounds great. In my location, there are no other stations near kHz so there is nothing to interfere with the Wide mode setting. Even though the U. AM audio bandwidth spec is something like 20 Hz to 10 kHz vs. FM's 20 Hz to 15 kHz , the Carver must be getting everything out of that since it sounds so good. My final point: If you have access to decent music programming on AM and want to get the most out of it, as well as damn good FM, then the TXa, TXb, or PSB should provide this better than just about anything else you can get hold of.
There is even one fringe station, on I looked all up and down the band for another case where the Carver was quieter but couldn't find one, so I can't explain that. See how one TXb sounded compared to many top tuners on our Shootouts page. According to our contributor doug s. Quite diminutive in size, as well.
Few buttons, but everything you need is there. Lots of clever automatic circuits, according to the manual, and great touches like the fact that the display intensity changes with signal strength. More detailed highs, perhaps a bit forward which is surprising to me for a Meridian product. Maybe the Creek is a bit laidback. The low end on the Creek was surprising, about as good as the , but overall the had less of a sense of space and a smaller soundstage.
Still a very good performance given that it was about one-quarter of the price of the when they were sold new. The Creek is a very good-sounding tuner on its own. Oh yeah, the RCA sockets are undersized and heavy cables tend to fall off if touched - annoying. Our contributor Dave N.
The ceramic filters are socketed rather than soldered, so it would be easy to swap them out for narrower ones.
Mac Audio MPX2000
If the tuner were mine, I would get rid of all these sockets. I'd also remove the ceramic filter sockets. Sockets add stray inductance and capacitance on high frequency circuits aside from the long term reliability issue. The internal wiring looks tidy but is not necessarily the best approach in terms of minimizing noise. I also noticed the 7-segment display wires running directly on top of the MPX board's gain blocks.