Crest 8001 - Value |
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Earplug
Old Croc Joined: 03 January 2012 Location: Europe Status: Offline Points: 7216 |
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Posted: 22 February 2017 at 12:36pm |
"I don't agree, with Viktor, this amplifier has very good sound, it was well designed, bullet proof build."
+100 Mine even survived getting plugged into 480v once (yes, I know: Meter Your Mains). The input switch-cum-breaker popped and that's all. After the mains were put back in place, they powered up & worked perfectly. I'd like to see how many (modern) amps could match that. |
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Earplugs Are For Wimps!
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Dub Specialist Sound
Old Croc Joined: 15 November 2013 Location: Smethwick Status: Offline Points: 4873 |
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We know tha hold there price,
not 100% bout the really old ones, but tha still going rate can be 400-500 depends on condtion my 2p man love crest all day man, wernt 3/4 grand new for nothing oo series....but do understand the age thing with them..
Edited by Dub Specialist Sound - 22 February 2017 at 11:40am |
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Musical Roots Reggae Vibration is Life! for music is sound...sound is vibration...vibration is energy... and energy begets life. Therein lies my passion!...MUSIC IS LIFE...
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Dub Specialist Sound
Old Croc Joined: 15 November 2013 Location: Smethwick Status: Offline Points: 4873 |
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Its amazing how so called crap tha are
still dropping heavy the old crest still doing the rounds in the soundsystem scene come on ppls, agreed nik
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Musical Roots Reggae Vibration is Life! for music is sound...sound is vibration...vibration is energy... and energy begets life. Therein lies my passion!...MUSIC IS LIFE...
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sajti
Registered User Joined: 03 December 2015 Location: Hungary Status: Offline Points: 23 |
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8001 was my favourite amplifier to drive the bass. Of course it was about 20 years ago. I don't agree, with Viktor, this amplifier has very good sound, it was well designed, bullet proof build.
We had about 20 pcs. and we lost only 2 channels in 4 years, even with heavy disco usage. It was easy to repair, and even easy to make it more powerful :) Agree, that the capacitors are expensive, but it's quite checp to replace them with the new snap in version, with a small pcb. Sajti |
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kedwardsleisure
Old Croc Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4947 |
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to be fair the CA series have been coming in with vented capacitors for a few years now, so not just the 7/8/9000 series. Luckily a set of caps for a CA12 is only £150-200 trade but they aren't as big as the ones in an 8000
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Kevin
North Staffordshire |
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nickyburnell
Old Croc Joined: 06 February 2005 Status: Offline Points: 4410 |
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Better start a Crest breakers yard then :)
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It's everything, not everythink!
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kedwardsleisure
Old Croc Joined: 20 January 2009 Location: Staffordshire Status: Offline Points: 4947 |
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Parts for those old crests are getting dear now.
A set of electrolytics could be as much as £450. You will find out if they've failed when they spurt boiling electrolyte all over the board in the middle of a bass drop. |
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Kevin
North Staffordshire |
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luton_soundman
Old Croc Joined: 03 August 2010 Location: Bedfordshire Status: Offline Points: 4539 |
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From the guy who loves pkn
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Sound Hire/Sales new/used equipment.
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nickyburnell
Old Croc Joined: 06 February 2005 Status: Offline Points: 4410 |
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This is brilliant. You keep up all the negativity and persuade the sheep they are all useless now. The rest of us will then rejoice is a market flooded with £100 8001's and PPX's etc. Good job, keep up the good work
Wow, sound must have been shit for the last 20 years |
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It's everything, not everythink!
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U.Viktor
Young Croc Joined: 04 May 2010 Status: Offline Points: 716 |
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The Crest 8001 is a 2x 1200W (4Ohm) amplifier as far as I remember. May deliver 1800W peaks on 4R load for short periods... Its weight is ~40kg, consumes 3 or 4 rack unit spaces, has terrible power factor, poisoning mains with injected current peaks, its power valid only rock solid 220Vac due non regulated power supply..
Despite its large number of output transistors, did not perform very well on certain speakers because the output stage did not like largely shifted output current vs. voltage due heavy dissipation in the endstage. As I remember it has a momentary U*I dissipation protection per output transistor arm and causes terrible sound effects when acted sometimes ;_) So let us say the linear amp has made to deliver 50A peaks but if you have just half the output Voltage the output momentary current shall not exceeds 25A, which is typical with resistive loads. Unfortunately the real speakers like to act as motors//generators so sometimes the maximum source and/or sinking current capability of endstage is required not only at time of peak Voltage events.. Here most of the linear amplifiers fall and properly constructed class-D win, which can deliver (or sink) its nominal output current at ANY output Voltage without the risk of exceeding momentary dissipation limits of the output power devices. This small trick is the secret sauce of good speaker control, what nobody tells you. |
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Earplug
Old Croc Joined: 03 January 2012 Location: Europe Status: Offline Points: 7216 |
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"Mein Gott, I 100% agree with one of Victor's posts!!! "
Now that is worrying! "Sorry to say this but the time has well went over the type of dissipative circuitry (analog, AB, classH), their linear transistors have never evolved to those levels like the switching couterparts." That's quite a sweeping statement. I still have amps made from/around the old Maplin/Hitachi MOSFET modules working fine after 30 years, never mind my Crests, etc. One guy I know recently got rid of his Ram Audio lightweights and replaced with 8001's. He's never been happier. And how would you define something like Lab Class TD - analogue or 'digital'? On the subject of the 8001, one thing you could do is stick a multimeter on the output and see if there's any (DC) drift. That is quite a good signal of the health of the amp. Edited by Earplug - 21 February 2017 at 3:34pm |
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Earplugs Are For Wimps!
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levyte357-
Old Croc Joined: 27 July 2012 Location: UK, South East Status: Offline Points: 8128 |
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Mein Gott, I 100% agree with one of Victor's posts!!! Edited by levyte357- - 21 February 2017 at 12:45pm |
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Global Depopulation - Alive and Killing.
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