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Old 20th June 2016, 04:16 PM   #1
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Default Good 2.5" fullrange?

Hi!

I just purchased this kind of a Sony CMT-X3CD for our kitchen: Wireless Hi-Fi Audio System for Home | CMT-X3CD | Sony AU

It's quite good looking, small enough, and has FM radio, CD, USB & bluetooth, so feature wise it's quite OK cheap "system" for a for kitchen. There aren't many other options on this size & price level anyway. But the problem is that it's sound quality actually quite bad; mids & highs are harsh and there isn't even a hint of the basses. So naturally I opened it, and noticed that I could quite easily fit some 2.5" full range drivers to replace the 2" original Sony's.

So my questions are;
- Do you think that I could get a bit better sound and even a hint of basses with some good quality fullrange drivers from it?
- If yes, which 8ohm 2.5" drivers would you recommend? Since it's just for background music & radio programs, I prefer musicality and easy-to-listen over analytical sound, and basses over high range details.

Few possible choices I already found are:
- FRS 7 S - 8 Ohm
- Data sheet - 830984 | Loudspeaker freaks
- Datasheet - ND65-8 | Loudspeaker freaks

All hints are highly appreciated! :=)
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Old 20th June 2016, 04:35 PM   #2
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SB65WBAC
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Old 20th June 2016, 05:06 PM   #3
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There doesn't seem to be 8ohm version of this? Since the original driver is 8 ohms, I would not want to risk the amp with 4 ohms driver...
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Old 20th June 2016, 05:44 PM   #4
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If you have opened it up find out what amplifier chip it is using.

I am guessing that it's going to be a class D monolithic design. This will no doubt include over current and over temperature protection. Connecting a 4 ohm loudspeaker isn't likely to cause any damage and just because it's using 8 ohm units does not mean that 4 ohm ones aren't suitable.

If you can see what the amplifier chip is (take photos of the PCB if you're not sure) then that makes thing simple as you can take a look at the datasheet.
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Old 20th June 2016, 05:46 PM   #5
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Is this it inside?

Click the image to open in full size.

Usually designs that include PRs aren't bass shy, or rather, don't have 'not a hint of bass' as the systems are designed specifically to exploit the PRs to get some bass.
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Old 20th June 2016, 06:01 PM   #6
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Originally Posted by 5th element View Post
Is this it inside?

Click the image to open in full size.

Usually designs that include PRs aren't bass shy, or rather, don't have 'not a hint of bass' as the systems are designed specifically to exploit the PRs to get some bass.
Actually no, that might be some more expensive version. This has only one 2" driver per side, without any PRs.
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Old 20th June 2016, 06:04 PM   #7
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Originally Posted by 5th element View Post
If you have opened it up find out what amplifier chip it is using.

I am guessing that it's going to be a class D monolithic design. This will no doubt include over current and over temperature protection. Connecting a 4 ohm loudspeaker isn't likely to cause any damage and just because it's using 8 ohm units does not mean that 4 ohm ones aren't suitable.

If you can see what the amplifier chip is (take photos of the PCB if you're not sure) then that makes thing simple as you can take a look at the datasheet.
Unfortunately the PCB is behind the CD player so that it's not easily accessible and I cannot see it at all. But if you really think that this kind of amps have enough protection, maybe I could give it a try...
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Old 20th June 2016, 07:53 PM   #8
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But if we get back to the original post; do you really think that SB would be clearly better than the three (8ohm) options that I listed?
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Old 21st June 2016, 01:32 PM   #9
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The SB has a really well engineered motor with class leading non linear distortion performance. It easily extends up to 20kHz too without any breakup beforehand. I've used it a number of times and it sounds sublime.

If bass is your priority though the ND65 would be the better choice as it's T/S parameters fit better for that.
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Old 21st June 2016, 02:07 PM   #10
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Ok, thanks again, I have to think about this a bit.

Or how about if I get them both; ND just for bass and SB for mids & highs! ;=) It actually would fit in quite nicely. But I don't know if it gets too complicated since it would surely need some low pass XO for ND's etc...?
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