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JVC RX-5V Dynamic Super A

H

HWF1

Well-Known Member
I got this reciever this week at SA and set it up tonight and it is the best sounding reciever I can remember hearing. My question is does the dynamic Super A refer to the outputs or the tuner in some way? Also anyone no what the power output on this thing is? She runs pretty hot, but our cat Rascle is not helping anything. This reciever just retired my Yamaha MX-800 which I'm very fond of.
 

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"Super A" is JVC's nonswitching technology--many brands also have used the nonswitching format.
The R-X5V is 60 wpc, and from 1986-88, $450. One step up from the BOTL.
I really am surprised you prefer it to the Yamaha. Of course, I'm not the one listening to your system.
I do like JVC gear, don't get me wrong, but the Yamaha separates are quite good.
 
I'm trying to get my thoughts around the difference that I'm hearing. There's more detail like the music is being pronounced more clearly. I moved my HPM-100's into my office a week or so ago and moved my 301's to the shop. Just finished listening Tim McGraw - Where the Green Grass Grows one of my fav's bass is more punchy its got that cool growly texture and at the end of the song I had never noticed the harmonic kind of sound in the music as it was fading. Maybe it just one of times when everything sounds better. :music:
 
Bully, So non switching I guess means Class A amp. When you say 60 watts does this mean 60 watts of class A power? If thats the difference then My HPM 100's and I are sold on class a amplifiers.
 
I have a JVC R-X500 which is one of the upper models of 1985 at 100wpc. Super A, GM Circuit, SEA EQ and a bunch of other technical jazz, flashing lights, spectrum peak indicator, something that probably would find it's place in Thor's house ;)

That said I paid $8.98 for it. Seemed pretty heavy for an 80s job so I hooked it up. Got it playing into a pair of unknown Martin speakers from the early 70s as of now in a bedroom system alongside the Kailin EL84 and Fisher RS-1060.

These things run HOT, hot enough where you wonder how they've lasted this long, but considering the heat it generates, it's never gone into protection and still works fine. Mine uses Sanken outputs and 10000uf "JVC Super Audio Grade" capacitors.

Honestly it doesn't sound half bad, clean, powerful, full. Not really a sound I'd rate as indicitive of the 1980s gear, it sounds pretty darn nice. I've never had a desire to remove it from the system it's currently in, I figure I'll leave it there until it dies under it's own heat.

I don't find it surprising that it sounds decent, while JVC isn't stuff I search out on a daily basis when it comes by at the right price I'll try it, and this receiver more than fit that bill.
 
Move the cat

Trust me. . .Sooner or later that cat will piss in your receiver. . .For some reason cats love those things. I have had several cats that liked to lay in warm places and every one that picked an amp or receiver pissed in/on it. Every one. . .

You will know instantly even if it doesnt short out and fry something. . .Not trying to be cute just helpful. . . It will happen. . . :yes:
 
You might let the heat out a bit better if you get rid of that furball on top your JVC................. :D
 
I used to have a JVC RX-550V from the late 80's. I used it for a long time. Traded it a few years ago for a Pioneer QA800A. I have no regrets.

mac
 
gyusher, Thats where my TT or her spring board to my desk is normally. I hope your problem was not male cats marking territory.

Unican_Eric, this is much much that a furball this is one fat spoiled cat.

yrly, Maybe its just my mind baising a $5.00 dollars purchase. I'll know when for sure after I run it a week or so then set the Yamaha back in.

mac, You know its funny how somtimes how something just grabs you. I think its just the little nuance of a class A amp if this thing is class A.
 
JVC audio components, in particular, the amplifiers, were built to last. I have repaired several pieces of consumer audio equipment over the years and JVC gave the cleanest sound or best bang for the buck. I still have an AX40 amplifer that still works and sounds quite good. As for repairing these units, it was pretty much straight forward and easy to get at, from a technician's standpoint. Yes, there were other better sounding units, but, as said, best bang for the buck in terms of sound, clarity and durability.
 
HWF1 said:
Bully, So non switching I guess means Class A amp. When you say 60 watts does this mean 60 watts of class A power?
Click to expand...
It's not a "true" class A amp, it's most likely a variant of a socalled nonswitching biasing scheme for the output devices in a more or less standard Class AB amp, designed to get rid of one of the many peculiarities of '70s solid state amps that had audible consequences. This one was easy to spot, once engineers knew what to look for. On oscilloscope traces, the ugly spike of distortion was clearly visible as the signal crossed over [thus the term "crossover distortion"] from positive to negative and vice versa; the "non switching" circuitry largely eliminated this, the benefit coming at low levels, where most listening gets done.

There's more information on non-switching amps (and reasons why they're not made any more) in this action-packed thread. Caution: high information density, proceed slowly, have a good textbook handy.
 
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This little reciever probably puts out 3 times the heat of my Yamaha MX800. I first thought the Super A had something to do with the fm section. After reading a few threads about the heat involved with Class A operation is when I began think this was a class A output.
 
Super-A cranks up the bias for small signals where the crossover or transitional distortion is not swamped out by signal size, and relaxes on the bias when the music gets loud. Both JVC and Yamaha designs used this approach, with JVC putting circuit in a single IC: VC5022-2.

Fred Longworth
http://www.repairaudio.com
 
In any case, get Rascle off the amp and take some pictures of her for one of the general forums. I can tell from her amp-sleeping posture that she's got comic cat potential.
 
Its been a long time since I studied electronics, biasing does that mean your working at the emmiter or base? Also what class would that make the amp? After I got Rascle off the reciecer I looked and the outputs have 2 different color transistors one each black and green. I know this is probaly wrong but I was thinking that might infer PNP and NPN matched pairs.
 
Sorry to dig up an old post but I found this board and post via Google.

I'll pay 50.00 for any working RX-5V's. After Christmas would be best..

I've had my RX-5V since it was new and I love it. I'm no audiophile expert but this unit has fit my needs perfectly since day one. "Back in the day" I had the full JVC compu-link setup, Receiver, dual tape deck, single Cd, TV and VCR. It was awesome. Never could find the CATV box they supposedly made.

All I have left is the RX-5V and a 5 disc CD changer. All the other pieces have died of old age. But I still use the RX-5V as my main receiver and A/V unit. I run my satellite through video1, a Linksys digital media player through video2 and my combo vcr/dvd in the VCR

I have a couple of broken ones I use to scavange parts from, the displays tend to die over time.

But now I want to put a working one in my camping trailer. A 4 channel A/V system would be perfect in the trailer. I can run both sets of speakers when the kids are awake and then turn off a set by their bunks when the go to sleep. Thinking of using the monitor A and B ports to drive monitors in the main and "master" bedroom of the trailer.

Anyway, sorry for the babbling. If you guys want to part with them I'll buy 'em.


All the best.
hg


UPDATE: Found info on replacement display bulbs:
Spoke to Specialty Bulb Company 800-331-BULB, ask for Jenine and got the exact details. The are: S2211 Festoon bulb also called a 6.4x30 flat ended festoon.

1.50 each in a box of 10, 4 week lead time. Their source gets them in from France.
 
I got ahold of an rx-701v with dynamic super A and it holds it's own to a bigger, heavier integrated amp, so these might be kinda sleepers... they keep the signal clean when it counts, and crank up the juice when you wanna rock... This is my 3rd super a jvc from the same era 1988-1992 and they just plain rock. I cleaned mine up with some compressed air, and a small detailing brush.. rock on JVC!
 
Very nice amp you have, rockin!
I have been a long time fan of JVC audio equip. A lot of it flies under the radar & goes for almost dirt cheap prices out there for the discrete buyer. The R-S33 receiver I once owned was certainly a great performer with only 40wpc.

Super-A technology is not True Class A, but has more a similarity with Class AB. JVC's Super-A technology did away with transistor switching distortion, in which, I believe that is why the R-S33 sounded more powerful than the modest rating of 40wpc when I listened to it.

Rome
 
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