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post #1 of 21 Old 01-12-2020, 10:13 AM - Thread Starter
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Need amp for Pioneer speakers with different connectors

Hi everyone!

I have four bookshelf speakers that I would like to set up on my laptop. They came off of a Pioneer Radio/CD unit (first picture).

The larger speakers have bare wire connectors, 70W max, and 8 ohm impedance.

The smaller speakers are 20W, 24 ohm impedance, but were plugged into RCA(?) output ports.

I've attached pictures of the speakers and connectors. My problem is that I really don't see many amps that I think will work with what I'm dealing with. Does anyone have any suggestions on an amp that will deal with four speakers and two different types of speaker connectors? I'm new to amps and I may be making this a lot more difficult than it is, but I don't want to buy, return, buy, return, etc., amps that aren't going to work.

Thanks for any help! ~ Gristle
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post #2 of 21 Old 01-12-2020, 10:19 AM
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Why use the smaller speakers at all?


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post #3 of 21 Old 01-12-2020, 10:39 AM
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Is this it > https://www.hifiengine.com/manual_li...xr-p670f.shtml ?
Join hifiengine.com and you can download the manual - no more guessing as to what plugs into where. They only have the service manual, but it usually gives user instructions as well.

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post #4 of 21 Old 01-12-2020, 02:05 PM - Thread Starter
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Originally Posted by Leeliemix View Post
Why use the smaller speakers at all?


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Just to be able to crank out as much sound as possible at all frequencies.
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post #5 of 21 Old 01-12-2020, 02:12 PM - Thread Starter
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Originally Posted by Knucklehead90 View Post
Is this it > https://www.hifiengine.com/manual_li...xr-p670f.shtml ?
Join hifiengine.com and you can download the manual - no more guessing as to what plugs into where. They only have the service manual, but it usually gives user instructions as well.
Hi, and thanks for the link! I'm basically just looking for an amp to be able to run the speakers from my computer. It was easy to hook up the speakers on the original Pioneer Hi-Fi CD/radio player, but I'm running into a snag trying to find an amp that will work with the speakers. I think I have a couple of workarounds - either a four channel amp or use 3.5 mm plugs on the bare wired speakers or some combination of something.
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post #6 of 21 Old 01-12-2020, 02:29 PM
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The picture of the back of the original player tells you pretty much what you need to know.

The rear speakers are listed as 24 ohms. That's pretty high; you may not get a lot of volume out of them from an amp intended to drive 8 ohm speakers. You could try: simply cut off the RCA plugs and use the bare wires or banana plugs.

The fronts are more normal.

You may be able to get better speakers at Goodwill, though.
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post #7 of 21 Old 01-13-2020, 10:30 AM
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Most class AB amps would drive 24 ohm speakers to about 1/3 the power that they would drive an 8 ohm speaker. A 60 watt at 8 ohm rated amp should be able to drive those 24 ohm speakers to their rated 20 watts. Most if not all Class AB amps should be completely stable at 24 ohms. It might not work as well on a Class D amp (though it should be close enough to "work" but may be less ideal since Class D amps tend to have output filters that are supposed to be somewhat matched to the impedance of the speakers the amp is rated to drive).
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post #8 of 21 Old 01-15-2020, 10:17 AM - Thread Starter
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Thanks DonoMan! I just scrounged up an old Scott A-457 amp that is part of a complete system we've had in storage. I fired it up and at least it works. I haven't hooked anything else (computer or Pioneer speakers) up to it yet - wish me luck. Is there any quick and easy way to tell what class this amp is?

Actually, now I'm kind of excited to be able to hook up the turntable and play some vinyl I've kept. The hunt is on for a new stylus!
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post #9 of 21 Old 01-15-2020, 10:35 AM
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Quote:
Originally Posted by Leeliemix View Post
Why use the smaller speakers at all?
My thoughts exactly, which is what I asked the OP in his other thread on the same topic:
https://www.avsforum.com/forum/89-sp...l#post59087294

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post #10 of 21 Old 01-15-2020, 11:01 AM - Thread Starter
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Quote:
Originally Posted by Pete7874 View Post
My thoughts exactly, which is what I asked the OP in his other thread on the same topic:
https://www.avsforum.com/forum/89-sp...l#post59087294
Thanks Pete ~

I tried to kill the other post because it was in the wrong category, but failed miserably ( NOOB alert!). I did at least manage to delete the images.

Anyway, as I said to DonoMan, I'll try to hook everything up to the Scott amp, and if nothing explodes or catches fire I'll be happy. If everything works and sounds good I'll be ecstatic.

ps - Gristle is most commonly a girl name
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post #11 of 21 Old 01-15-2020, 11:15 AM
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Quote:
Originally Posted by gristle54 View Post
Just to be able to crank out as much sound as possible at all frequencies.
Again, I wouldn't bother with the smaller speakers. They were designed to provide some simulated surround sound effect, more like some background filler and not really discrete channels. They will play at much lower volume than the two main ones.

If you value clean stereo sound, just stick with the two main speakers and forget the two others.

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post #12 of 21 Old 01-15-2020, 12:27 PM
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Question

Sorry I dont want to hijack thread but since I cant post new threads i hope this is ok to ask here.



I need some recommendations on which common stereo amplifier I should buy when using these speakers.

Dynavoice challenger-m-105

For example normal Yamaha or Onkyo amps.

Thanks for any assistance since I am lost at the moment, I dont want the amp to limit the speakers.

once again sorry gristle54 for borrowing thread.
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post #13 of 21 Old 01-15-2020, 01:00 PM
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Quote:
Originally Posted by cazrack View Post
I need some recommendations on which common stereo amplifier I should buy when using these speakers.

Dynavoice challenger-m-105

For example normal Yamaha or Onkyo amps.
Any amp that can handle 4 Ohm speakers should be fine. The number of watts will depend on how loud you like to listen.

On paper, your speakers have very high sensitivity (94 dB), so they should be pretty easy to drive.

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post #14 of 21 Old 01-15-2020, 03:09 PM
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Dynavoice Challenger M-105

Technical Specifications:
Speaker Type: Floorstanding construction: 3-way Bass Reflex with 2 free Dumpers bi-wiring tecn. X-Change 5.25 woofer
tweeter: 1 inch SuperAudio
middle mid-range: 2 Carbon Fiber
Woofer 2 Kevlar fibre 10 "woofer:
4 – 8 Ohm Impedance:
24 – 32.000 Hz frequency response (-3 dB)
sensitivity ': 94 dB
Maximum Power: 300 W,
Weight: 23.5 kg
piece measures (h-l-p): 1100 x 290 x 395 mm.

With a 94db sensitivity any stereo receiver will work fine. Just pick the one with the features you want between Yamaha and Onkyo

Afro GT
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post #15 of 21 Old 01-15-2020, 04:07 PM
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Afrogt sorry but the specs you isnt correct

Its

Specifications
Type: Floorstanding Speaker
Model: M-105
Colour: Black, Oak, White
Power Handling (RMS): 210 W
Power handling (Max): 300 W
Frequency Range: 24 - 32.000 Hz
Sensitivity: 94 dB
Nominal Impedance: 4-8 Ohms
Crossover Frequencies: 250 / 3000 Hz
Woofer: 2 x 10 inch
Midrange: 2 x 5,25 inch
Tweeter: 1" Super Audio
Dimensions (WxHxD): 290 x 1100 x 395 mm
Weight: 32,9 kg
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post #16 of 21 Old 01-15-2020, 05:21 PM
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They are the same specs, just formatted differently.


I agree with Pete that the amp/receiver should be rated to handle 4 ohms. Yes, it is probably the case that a 6 or 8 ohm rated receiver probably will be fine if you don't crank the volume, and you likely won't need to crank the volume when the sensitivity is good. But it's still less likely for that to work without issue.


"4-8 ohms" means that different frequency ranges vary in impedance based on the specific drivers used and the crossover.


In this case, 2 woofers, they will be 8 ohm woofers in parallel for 4 ohms.


Around 60-70% of your total signal is going to the woofers, so 70% of the speaker is a 4 ohm speaker.


Consider it a 4 ohm speaker.

Last edited by DonoMan; 01-15-2020 at 05:24 PM.
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post #17 of 21 Old 01-17-2020, 01:00 AM
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Quote:
Originally Posted by DonoMan View Post
They are the same specs, just formatted differently.


I agree with Pete that the amp/receiver should be rated to handle 4 ohms. Yes, it is probably the case that a 6 or 8 ohm rated receiver probably will be fine if you don't crank the volume, and you likely won't need to crank the volume when the sensitivity is good. But it's still less likely for that to work without issue.


"4-8 ohms" means that different frequency ranges vary in impedance based on the specific drivers used and the crossover.


In this case, 2 woofers, they will be 8 ohm woofers in parallel for 4 ohms.


Around 60-70% of your total signal is going to the woofers, so 70% of the speaker is a 4 ohm speaker.


Consider it a 4 ohm speaker.

Thanks for helping, so which Yamaha amplifier/receiver for example 701, 602, 501, 303, 301, 201 would be enough for these speakers to not sound gimped at high volume?

tested them with a Sony surround str 590 in stereo mode 2.0 and I can feel it has not enough power when I increase volume, Music quality degrade as I increase volume.

(Not intrested in extreme volume levels.)



Thanks!
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post #18 of 21 Old 01-17-2020, 07:09 AM
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At least the 701 and 602 would be rated 4 ohms. I didn't look at all of them. It's tough for me to say exactly what your problem is without hearing it (in person) myself. Do you have stores in your area where you can return equipment without a fee? If so, you could try a receiver upgrade and if it doesn't help, you could return it if you want. Again, I don't know if the receiver is your problem. All speakers increase their distortion as you increase the output due to things like suspension non-linearity and power compression. But your speakers certainly seem like they should be able to handle some reasonable output levels. I've never heard those speakers though.
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post #19 of 21 Old 01-18-2020, 02:12 PM
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Decided I will try with a Yamaha S701 since it seems have much more power compared to the rest of thé amplifiers i can get ahold at that pricerange.
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post #20 of 21 Old 01-18-2020, 08:03 PM
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Quote:
Originally Posted by cazrack View Post
Decided I will try with a Yamaha S701 since it seems have much more power compared to the rest of thé amplifiers i can get ahold at that pricerange.
You may be expecting too much from your speakers.
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post #21 of 21 Old Yesterday, 02:49 AM
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Originally Posted by bobknavs View Post
You may be expecting too much from your speakers.
Yes I am aware of that, maybe a Yamaha 501 or 303d or 301 would be enough, my speakers are cheap large home speakers so not expecting a miracle.

I was thinking about getting a onkyo 696 since its more powerful then my sony str dh590 but since i am only doing stereo with these speakers I want more amplifier power and more geared for music instead of features.

I also tried a old Arcam Alpha 8 amplifier but not certain it still is in 100% condition since after a like 30 minutes it starts to produce noise in the speakers even if you stop playing music like it has been overloaded/overheated or something, the cheap str dh590 does not behave this way it simply loses sound quality when turning the volume up.

Last edited by cazrack; Yesterday at 04:35 AM.
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