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Old 25th May 2006, 08:57 AM   #1
garymck is offline garymck  Australia
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Default old Nad 3155

Hi,
I'm just getting back into HiFi after a very long hiatus. I've just unpacked my old amp - an Nad 3155. In its day it was well regarded. In todays terms is it worthwhile to keep, or should I replace it? It's the only part of a sytem that comprised a Linn Sondek LP12/Grace G707/Dynavector 10x, Nad 3155, and Rotel RL 850 speakers, that survived the usual marital disaster years ago. At this point I am not in a position to spend lottsa $, so was hoping that this amp could, at least in the short term provide a reasonable basis for a starter system.

cheers
Gary
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Old 25th May 2006, 12:32 PM   #2
sreten is offline sreten  United Kingdom
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Hi,

I regard it as an excellent amplifier for a starter system, especially
if you are considering vinyl, evenmoreso for moving coil cartridges.

As this is DiyAudio you could tart it up a bit - contact cleaning and
replacement modern electrolytics throughout should improve things.

Anyway partnered with a half decent CD player (secondhand Arcam ?)
and good second-hand (or self built) speakers it should sound fine.

/sreten.
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Old 25th May 2006, 01:37 PM   #3
garymck is offline garymck  Australia
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Quote:
Originally posted by sreten
Hi,

I regard it as an excellent amplifier for a starter system, especially
if you are considering vinyl, evenmoreso for moving coil cartridges.

As this is DiyAudio you could tart it up a bit - contact cleaning and
replacement modern electrolytics throughout should improve things.

Anyway partnered with a half decent CD player (secondhand Arcam ?)
and good second-hand (or self built) speakers it should sound fine.

/sreten.

Hi sreten,

thanks for the reply, what sort of electrolytics would be suitable - any sound better than others?

cheers
Gary
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Old 25th May 2006, 04:43 PM   #4
sreten is offline sreten  United Kingdom
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Hi,

I'm not very up to date on Electrolytics for audio coupling.

However the advent of SMPS (Switched Mode Power Supplies) has
certainly improved power supply electrolytics since the amplifier
was made.
You want "low-Z" "low-loss" "low inductance" "low ESR" or some
other buzzword types.

Only do this if you are very keen on messing around with
your amplifier and also know exactly what you are doing.


/sreten.
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Old 28th June 2006, 03:24 PM   #5
WhyZed is offline WhyZed  Canada
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I have this amp, it is a great piece that has pounded out tunes daily for literally decades.
Its duties today rock a pair of Rogers LS7s in the garage. It is paired with a Luxman 130W amp and an electronic crossover driving 2 home built 12 subs (big garage).

Im having troubles with a NAD 304 I own, the wife says to chuck it and get another. If I saw a 3155 on a used rack Id buy it. It has been very good to me.
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Old 28th June 2006, 08:30 PM   #6
frugal-phile(tm)
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The 3155 is a decent little amp (probably not quite as good as a 3140). You can mod it with good results. Beefing up the PS elcos and bypassing them, and replacing some critical coupling caps with polys can make a difference. Power switches & volume controls on these tend to die.

Probably not worthwhile to go crazy on it. It also has separable pre/power which means you can start diying your own bits and use it as a pre, a power, or even just a phono-pre. When i was selling these (NAD amps as a class), quite a few people would add another amp & bi-amp.

dave
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Old 5th July 2006, 09:27 AM   #7
cel4145 is offline cel4145  United States
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Default 3155 still running

FYI: I'm the original owner of a 3155. It's been great to me. For the last five years, I've been using it to power an NHT sub.
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Old 5th October 2011, 06:07 AM   #8
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Default 3155 vs preamp

I'm obviously years late to this discussion, but in the off chance anyone is still following the thread, I thought I'd pose a question.

I'm upgrading my home audio system to a new a/v receiver and no longer have a phono input. I'm looking for a preamp, and with all of my other upgrades, need to be tight on spending. I've come across a 3155 for $50 used. How would this compare to a dedicated phono pre, such as the NAD-PP1, or other similarly priced preamps. Any input would be greatly appreciated!
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Old 5th October 2011, 01:02 PM   #9
sreten is offline sreten  United Kingdom
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Audio Technica AT-PEQ3 phono preamp,Audio Technica AT PEQ3 phono preamp,Audio Technica ATPEQ3 phono preamp

Click the image to open in full size.

Hi, would be fine, but the above takes up less real estate, same price area, rgds, sreten.
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Last edited by sreten; 5th October 2011 at 01:04 PM.
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