M-1.5t

Posted by Mark
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Carver M-1.5t

8-ohm FTC rated power/ch 350W
IM Distortion 0.15% SMPTE
Input Impedance (Line) 100k ohms
Rated full power bandwidth +0, -3dB 1Hz to 100kHz
S/N-IHF A-Weighted,dB > 100dB IHF A-Weighted
Slew Rate >200
Dimensions (HxWxD inches) 3”H, 19″W, 10”D
Comments LED 1msec attack 1sec release, Protection:: Short Circuit, Voice Coil temperature trip, Clipping, Thermal Shutdown, DC offset
 
Our M-1.5t description starts out with a story instead of the usual superlatives. Once, Bob Carver visited a famous sound researcher who was attempting to recreate the “snip” of an ordinary pair of scissors. He used no less that TWENTY-FOUR 200-watt amplifiers for playback. Yet when viewed on an oscilloscope it was apparent that the top of that instantaneous transition was being distorted. Believe it or not, he needed more power! It was evident that real-world sound occurs very quickly and requires far more power than ANY current amplifier could produce. The M-1.5t is a culmination of Bob’s search for enough power, the ultimate amplifier for the reproduction of music today and for years to come. Why such massive amounts of amplifier power? Music is full of surprises such as explosive crescendos, combinant crests of demand created by multiple instrument sounds and the shock levels that some well-recorded instruments can instantly attain. This is what makes music live. These incredibly intense bursts of sound don’t necessarily have to be loud. They are too short in duration. But, like the scissor snip, they are intense and demand power. Recorded music sounds dull without these constantly-occurring high instant peaks. If your amplifier cannot provide the instantaneous power to surmount these rigorous musical punches when they are presented at its inputs, it makes a sound of its own devising, literally an electronic gagging we call, clipping. The result is an audible degradation which has pervaded your listening for years. A form of distortion which has been difficult to avoid until the M-1.5t arrived. How much can the M-1.5t weigh less than some preamps and yet pack more muscle than power amps weighing five times as much? The M-1.5t vs convention. A traditional amplifier’s power has only two chances during each AC line voltage cycle to recharge and store energy. To meet musical demands in between, it must maintain a reservoir of energy which means that as conventional amplifiers grow more powerful, their transformers and supply capacitors must grow proportionally larger too. The result is a vast increase in the size, mass, heat and expense. Light as a preamplifier, cool as a cucumber, the M-1.5t transforms almost all the energy it draws into usable power with a patented power regulator. Engineered to be directly responsive to the moment-to-moment power requirements of your music, it is a direct “value” from the power circuits to your house with no need for efficient intermediate storage. Your speakers are literally getting their energy from the power generator! This is done with a patented Triac switch and Magnetic Field Coil which actually spend most of their steeping UP the line voltage values and only deliver maximum line voltages at peaks of peak musical demand. Rating the M-1.5t. The conservative 350 watt per channel rating on the back of the M-1.5t only hints at its true capabilities. When a musical note sounds, each channel of the M-1.5t immediately puts up to 600 watts diminishing over several seconds to the rated 350 watts. Several seconds is a long time in the life of a music waveform. Any peaks requiring anything like 600 watts will come and go in a few hundredths of a second. Let the waveform subside for as little as 1/100 of a second and the amplifier resets itself, capable of providing the 600 watts per channel again. Because of the tremendous capacity of the M1.5t’s power supply, there has been no need to isolate the channels. Thus, when pressed hard, either channel is free to BORROW an additional 150 watts from the other for a total of 750 watts. Brute power controlled. Implicit in this much power is a set of carefully designed speaker and amplifier protection circuits. Should you even overload your amplifier, a unique clipping eliminator circuit pulls the M-1.5t out of clipping. Next we designed a set of total shut-off mechanisms into the M-1.5t to protect against temperatures against 70C, extensive out-of-phase infrasonic/low frequency signals, excessive DC currents. Your speakers are protected from underground line-level connections, oscillations, and real-world accidents like shorted speaker wires. The M-1.5t final protection mechanism is very special. While good speakers have voice coil heat dissipation safeguards, the M-1.5t also keeps track, actually averaging loud speaker input and “remembering” for about three minutes backward in time. If it judges the amount to exceed the safe limits for high quality loud speaker woofer voice coils, it will momentarily interrupt power to cool them. A window on power. Thirteen LED’s on the M-1.5t’s face simply monitor power. The fourteen signals headroom exhausted. (When it blinks at high levels, you know the special anti-clipping circuits are operating). The fifteenth LED is diagnostically fault indicator. Along with first two LED’s and an internally generated tone, it informs you of overload problems, routine protection shut down and other occurrences. The music of power. Of the Carver M1.5t, Peter Aczel, Editor and Publisher of The Audio Critic has said, “ the equal of any power amplifier in transparency, focus and smoothness, and of course, far ahead of any other we tested in sheer gut-shaking power and spatial detail, instrumental definition and completely natural dynamics on familiar records to a degree we did not know was extractable from the grooves when we listened through lesser amplifiers. At this level of sonic performance, the astounding small size and cool operation of the M-1.5t become the icon of the cake, rather that the main attraction”. Power of life. The Carver M-1.5t is the amplifier your hi-fi system will ever need. If you like the final edge of reality in your playback, no matter what sound level you choose, The M-1.5t is your answer. Are you ready?

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Comments on 'M-1.5t' (16)

  1. First, I need an owners manual for a Carver PM 1.5 power amp.
    Second, the fuse “cap” in the back broke and I need a replacement.
    Third, a company of your stature shouldn’t have a cheap, crappy WordPress blog as its web site. I could do a fantastic one for you. Let me know.
    AndyO

  2. Mark says:

    Carver PM 1.5 Owners Manual

    Carver Repair may have that fuse cap.

    This site is a fan site. Carver Corp went out of business.

  3. Tony says:

    I see the M-1.0t and 1.5t listed on the site. Does anyone have specs on the M-4.0t and why is it not on the site.
    Thanks

  4. Thomas Womack says:

    Hi,

    Just a quick update on some info I found here…I just downloaded a manual for the PM 1.5 Amp and it is rated at 450 watts at 8 ohms and 600 watts at 4 ohms and 300 wpc at 16 ohms. I dont know if this conflicts with info that you know to be correct, but this comes directly from a PDF of the original manual. Thought you might want to update your website info. Any questions, please feel free to contact me.

    regards,

    Tom

  5. Jimmy Bauer says:

    Great site everyone!
    I own two pieces of this audio history, and I consider myself part of a secret society. The name Carver has become nearly unheard of in my area, and because of that I am reminded “Keep the best for myself.”
    On occasion, I get a chance to introduce individuals to these wonderful boxes of brushed metal, and show them what people are missing from their modern equipment. There is no better feeling for me.

    I do, however have a question about a recent speaker selection I’ve added to my audio arsenal.
    This is a question about impedance/ohms.

    I own A Carver M-1.0t and a M-0.5t. The M-1.0t has the original owner’s manual, but it has me questioning compatibility.

    Here is what I need to know from you smart folks..

    I purchased two speaker enclosures with DUEL 10″ Woofers. The woofers are 4ohm.

    My M-1.0t manual states “350w RMS P/chan into 8ohm @ 1kHz. AND 500w RMS p/chan into 4ohm @ 1kHz. AND finally, 1000w RMS into 8ohms single channel.”

    Clarification defines my need. I have always used 8ohm, but the FOUR 4ohm 10inch woofers will put the range of sound in my studio over the top!!

    Can I safley use 4ohm subs on either of the two amps?
    I don’t have the manual for the 0.5t, so I will assume power/wattage will be the only real difference in that respective portion of the specifications.

    My preference is to run the 4ohm subs into the 0.5t. I appreciate you reading, and I hope to hear back.

  6. Jimmy Bauer says:

    EDIT FROM ABOVE:

    The manual does state “350w RMS P/chan into 8ohm @ 1kHz. AND 500w RMS p/chan into 4ohm @ 1kHz. AND finally, 1000w RMS into 8ohms single channel,” BUT it is the specifications for
    “POWER AT CLIPPING”

    The manual states this as well.

    POWER OUTPUT: 200w RMS P/chan into 8ohms from 20Hz to 20kHz.

    I understand clipping at a novice level, so my confusion is why does it mention 4ohms on the specification sheet at all? especially under “power at clipping” when clipping is bad.

    The manual later boasts this amp is “Second to None” capable of delivering more then 350w RMS p/chan @ 8ohms further clouds my understanding of Clipping. I thought RMS meant continuous…If clipping is an amp choking, and RMS is continuous….Then why under the specs “Power at clipping” does the term RMS even belong? continuous clipping ?.

    LOL, I am so sorry for the ramble, but I REALLY crave knowledge. Even more for my own equipment
    WHY ARE THEY CONFUSING ME!?

  7. Brian says:

    I love the CARVER M-1.5t. I it bought 5 years ago, initially because I had a PIONEER SPEC 4 which needed a little work, and I wasn’t sure if it was worth repairing or not. A year ago, I got the Pioneer repaired (new caps, re-calibration by a hi-fi shop), and decided to hook it up to hear how it sounded when the work was finished. It sounded great, and after a few weeks, I decided to just leave it in place.

    So, now I have an un-used CARVER M-1.5t … hate to sell it, but also hate to know it’s going to waste (not being used)…

    decisions decisions decisions.

  8. CV says:

    @Jimmy.

    RMS does not mean continuous, it is a way of computing the power an AC waveform has that is equivilent to a DC measurement. The numbers you cited are for continuous RMS, which is … well continuous, and there is the key.

    The amp can deliver 350w continuous to meet the FTC requirements for a specification, or “musical” waveforms of over 600w into an 8 ohm load.

  9. Lee says:

    Rare find I have three(3)pieces of Carver equipment in like new condition. Original boxes with manuals, models C-1, M-1.5t, and Tx-11a. Purchased when on active duty, now only setting around gathering dust. Also have a pair Of Klipsch (Forte), and a TEAC X-2000R Stereo Tape Deck, TZ-650 Dust Cover, and CS-605 Tape Deck Stand all TEAC. Would like to sell e-mail if interested.

  10. Hello,
    In 1984 I purchased 2 Carver M 1.5 amps,a Carver preamp with sonic holography,aCarver CD player and a Carver am-fm tuner for my office.The Speakers that I purchased with the Carver stuff are Snell CIi.Shortly there after I moved my setup to my home.At that point my wife had a fit and the stuff sat for the next 33plus years.I am about to set the gear up again.There is only
    about 20 hours use on my stuff.Are there any concerns-problems I might encounter ?Thanks in advance !

  11. Sean says:

    I love my Carver power amps. I purchased 3 (2 PM1.5s and 1 PM 2.0T) brand new in 1985ish. As an audiophile and DJ these amps were used extensively and played very loud and hard. Each of these amps were set up to drive a specific channel ( 1for highs,1 for mids and 1 for bass) through my Rane electronic x-over. Once these amps are fed the dedicated AC power requirements the sound is crystal clear and very powerful . They are also very reliable amps, never let me down. Although I stopped DJing about 22 yrs. ago, I still have these amps set up with all my equipment for pure listening pleasure only. What amazes me is how little these amps are worth today.

  12. andrew says:

    Hi Lee, do you still have equipment available. Where are you located. regards, Andrew

  13. Gary Schwebach says:

    I used these in my DJ systems. Had the capacitors upgraded and it worked awesome on a pair of 4732 JBLs and I used qsc 1500 for the double 18 lows. I had the cleanest sounding system out there.

  14. Bobby Yago says:

    I have two C1 preamps that i still use these days, the M1.5T is sitting around the room, all still working, given to me by a friend who bought new set. Great equipment, never lets me down when i need a push while cleaning the house..greetings from the Philippines!

  15. Duane Donaldson says:

    I need to purchase a new replacement power transformer for my 1.5t Amplifier, will anybody be able to point me to a parts source please. Vintage mid 1980s model, 110 volts. Thank you in advance, a US Military Veteran.

  16. Alan says:

    I recently bought an M-1.5t myself, but it hasn’t come yet. I found that this company bought all the spare parts and is servicing Carver equipment so they may have what you need. Thinking I may need to get a refurb depending on the condition of the one I bought when it shows up. Good luck

    http://www.carveraudiorepair.com/index.html

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