7270 sub too small? clipping/protection - Forum
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7270 sub too small? clipping/protection
stefan75, modified 6 Years ago.
7270 sub too small? clipping/protection
Youngling Posts: 16 Join Date: 3/18/17 Recent PostsThe 7270 is set to defaults (dip switch down) except:
LFE in use = YES
System Level = -20dB
Do I have to change another setting, or is the 7270 just too small for my room (only 250W)?
I'm thinking of buying a 7370 (analog and 400W), will it be strong enough and without clipping?
Or should I wait for the 7371 (dual 12")?
ilkka-rissanen, modified 6 Years ago.
Re: 7270 sub too small? clipping/protection
Yoda Posts: 2564 Join Date: 3/23/09 Recent PostsOur subwoofer recommendation for a 1038 based 5.1 system is 2x 7271A so no wonder that you are clipping your single 7270A. Unfortunately a single 7370A won't be enough either. Dual subwoofers will you 6 dB more maximum SPL over a single unit so if you are only clipping your single 7270A occasionally, then probably 2x 7370A would be enough for you. But please remember that your main monitors have 15 inch woofers in them. It is unrealistic that you could have only single 12 inch as a subwoofer!

stefan75, modified 6 Years ago.
Re: 7270 sub too small? clipping/protection
Youngling Posts: 16 Join Date: 3/18/17 Recent PostsMy digital surround processor lets me fine tune the bass management.
I leave the 5 channels untouched (full), but low pass filter the LFE channel.
The interesting thing was, when set to 40Hz the 7270 was too quite/weak.
After setting the low pass to 33Hz the effects (explosions etc.) were much more powerful.
I'm guessing the sub could focus his limited energy on less frequency.
I read in the manual about the performance gain when positioning the sub close to a wall.
I really want to try that but I'd have to rearange some furniture/devices first.
cu
ilkka-rissanen, modified 6 Years ago.
Re: 7270 sub too small? clipping/protection
Yoda Posts: 2564 Join Date: 3/23/09 Recent Posts
stefan75, modified 6 Years ago.
Re: 7270 sub too small? clipping/protection
Youngling Posts: 16 Join Date: 3/18/17 Recent PostsLet's say I have the 1038 LCR, 1037 RR/RL and two 7370.
What crossover/bassflow would you recommend in 5.1 (bluray movie) mode?
ilkka-rissanen, modified 6 Years ago.
Re: 7270 sub too small? clipping/protection
Yoda Posts: 2564 Join Date: 3/23/09 Recent PostsSince you have very capable mains and surrounds which do not necessarily require bass management, I would just run them large and have the subwoofer produce only the LFE channel. But as I wrote earlier, a single 7270 just can't cope with those speakers if you want to play them loud.
Your speakers have 2x15", 2x12" and 2x10" woofers in them and your subwoofer has only single 12". It is an unrealised equation

stefan75, modified 6 Years ago.
RE: Re: 7270 sub too small? clipping/protection
Youngling Posts: 16 Join Date: 3/18/17 Recent PostsI'm curious, how is the overload protection done...
do you analyse the signal?
do you measure the driver movement?
do you measure the amp usage?
jani-oksanen, modified 6 Years ago.
RE: Re: 7270 sub too small? clipping/protection
Jedi Master Posts: 449 Join Date: 3/30/17 Recent PostsHi Stefan,
Answer to your question can be found from link below:
https://www.genelec.com/key-technologies/protection-circuitry
Best regards,
Jani Oksanen
Customer Support Team
johnvnross, modified 6 Years ago.
RE: 7270 sub too small? clipping/protection
Youngling Posts: 3 Join Date: 11/4/12 Recent PostsHi there. I also have 1038's and 1038ac as my home cinema LCR. My 7071 / 7070 provide enough bass for my 6m x 5m x 2.40m cinema. Best wishes john.
stefan75, modified 6 Years ago.
RE: 7270 sub too small? clipping/protection
Youngling Posts: 16 Join Date: 3/18/17 Recent Postsjohn ross:Hi there. I also have 1038's and 1038ac as my home cinema LCR. My 7071 / 7070 provide enough bass for my 6m x 5m x 2.40m cinema. Best wishes john.
While I'm waiting for the new successor of the 7370... I might be tempted to get a used 7071 (missed an auction recently for < $1000.. NOOO~~~).
thanks
thuety (avsforum)
stefan75, modified 6 Years ago.
RE: 7270 sub too small? clipping/protection
Youngling Posts: 16 Join Date: 3/18/17 Recent PostsCouldn't wait for the new sub any more... got a used 7071.
First tests: nice :)