Jamo 7.7 and Denon amp

[stevo1210]

My father is looking into purchasing some Jamo 7.7 series speakers to go with his Denon AVR-1803 amp which he bought a few years ago. The amp isn't a cheapie at $1000!
Anyway, when we moved house, he solde off the old B&W speakers that went with the amp as they were too bulky to move along... plus the new owner of our old house wanted them and they paid some good $$$.
Anyway, we ran across a set of Jamo 7.7 floor standing speakers. I haven't been able to fish out enough information on these speakers, apart from the price tag of $4799.


Managed to run across a forum talking about them... in some language?
http://www.avx.hu/forum/index.php?/t...150-jamo-d570/

The store selling us the speakers said 4-8 ohms and 200W. That's all they know?

Since when did speaker ohms go 4-8? Some online sources say 4, some say 8 ohms... WTF is it?

I don't know anything so will 4-8 ohms work with our amp? The Denon amp says too much jargon at the back and being confined to a bed isn't helping me!

[Th3_uN1Qu3]

Re: Jamo 7.7 and Denon amp

A bit of googling around revealed this page of technical details about the Jamo 7.7: http://aarestrups.dk/thejamo707series/Main707.htm

They are 4 ohms. The sensitivity isn't stellar, so don't expect them to go ear-splitting loud. They state 90dB at 2.83v, which is 1W into 8 ohms, but 2W into 4 ohms, so that's technically cheating. At 1W, the sensitivity is 3dB lower, which solves to 87dB. Pretty average. At maximum output of your receiver, which appears to be 110W/ch, that would be around 105-110dB in-room, and 116dB if you're standing just 1m away from the speakers. Not too shabby, but some like 'em louder.

The manual for the Denon receiver says it does support 4 ohm speakers for the front channels, and it is equipped with a protection circuit, so you should be okay.

[stevo1210]

Re: Jamo 7.7 and Denon amp

Just checked the back of the Denon... it says 6 ohms to 16 ohms?

Anyway, are there any other speakers apart from Jamo 7.7's that we could perhaps look into which offer high quality sound. My father is in his mid 60's, I doubt his ears are as sensitive as mine LOL

I personally use Tannoy Mercury MX3's and they are really good. Nice treble and mids... bit lacking on the lows but my KEF PSW subwoofer takes care of that :P

[stevo1210]

Re: Jamo 7.7 and Denon amp

Just paid $540 for the Jamo 7.7's. Now I just have to pick them up and plug them in Will let you know how it goes.

EDIT: Forgot to add that we are only running a 2.1ch audio setup, not a 5.1ch setup as we don't have room

[stevo1210]

Re: Jamo 7.7 and Denon amp

Hi Everyone,

It's been a few months with the Jamo set up. It all works no problems at all with our Denon AVR-1803. However, I do find that the volume is quite faint and I have to turn it up quite high to get a "decent" amount of volume to come out of the speakers. Is this because the amp is 6 ohms and not native for the 4 ohm speakers? I'm looking into a decent 4 ohm amp... probably the Onkyo TX-NR or SR series as they are 4 ohm compatible. Will this solve the issue with the weak volume?

Thanks.

[Th3_uN1Qu3]

Re: Jamo 7.7 and Denon amp

You need an amp that can drive 4 ohm speakers AND has more power output. Like i said above, the sensitivity of those speakers is pretty low, so they'll need quite a bit of power dumped into them to go loud.

[stevo1210]

Re: Jamo 7.7 and Denon amp

You need an amp that can drive 4 ohm speakers AND has more power output. Like i said above, the sensitivity of those speakers is pretty low, so they'll need quite a bit of power dumped into them to go loud.

I ended up buying an Onkyo TX-SR602 today for $150 second hand off eBay. I'll be picking it up in a few days I hope. It's a 4 ohm compatible amp! The specifications state that it will work to 165W under a 4 ohm set up. I hope this is powerful enough to power the Jamo speakers!

[Th3_uN1Qu3]

Re: Jamo 7.7 and Denon amp

In terms of acoustic output, 110W vs 165W on the same speakers is a very small difference. Now, it also depends on how honest the ratings are on each amp. You'll know for sure when it arrives.