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  Topic Review (Newest First)
10-15-18 08:29 PM
theJman
Re: HT Center Speaker Matching with Front Speakers

Quote:
wtaylorbasil wrote: View Post
I had a look at the AT-2 and it goes down to very low frequency output. May be I ought to ask a more "fundamental" question. Center speaker handles the speech section and that should be enough with less than 200Hz to may be 2.5KHz. So why do we need a full range speaker. Once I understand this may be I can move on.
The center is known mostly for voices but it does handle quite a bit more than that. Even if all it did was voices males can reach down to the 80Hz range so stopping at 200Hz would lead to a very thin sound.


Quote:
wtaylorbasil wrote: View Post
As I have responded to theJman in my post 8. Do I need a full range speaker to match? Can you help me understand this philosophy?
Ideally you want to match your left and right to the center as the front 3 constitute the vast majority of the soundtrack from traditional 5/7.1 systems. For example, you don't want to have a center with a horn tweeter and left/right speakers with a soft dome tweeter as their voicing wouldn't be consistent. To the best of your ability you want to match the performance, capability and drivers across the front 3.

Given your situation it might be worth considering that phantom center option. In essence it takes the output that would have gone to a center channel and blends it into the left and right channel to create the illusion of a physical center speaker. Since it's unlikely you'll be able to match your current speakers it may a workable compromise.
10-15-18 10:07 AM
Andre
Re: HT Center Speaker Matching with Front Speakers

Tech specs on the speakers

Technical specifications
Years manufactured: 1977-1981
Original MSRP: 630 british pounds
Drivers: KEF B139, KEF B110A, Celestion HF1300, Celestion HF2000
Recommended Power: 50-100 Watts
Efficiency: Approximately 85dB depending on tilt control
Crossover: 375Hz, 3.5kHz, 13kHz
Vented, Sealed: Transmission Line (info)
Frequency Response: 20hz to beyond audibility
Dimensions (on supplied stands): 41.75" (H) x 18" (W) x 15.75" (D)
Weight: 37kg each, 45kg with stands

With that info you can look on EBAY UK for a Celestion F48C or a KEF Cresta
10-15-18 09:25 AM
Kal Rubinson
Re: HT Center Speaker Matching with Front Speakers

Early Spendors used the same HF with Bextrene woofer/mid. Might work.
10-14-18 07:08 PM
ajinfla
Re: HT Center Speaker Matching with Front Speakers

Agree with Kal the bass loading shouldn't be a consideration. Finding a center speaker with similar drivers and physical layout might be difficult if not impossible. There is a DIY option of finding a single TLS80 and hacking it up into a center. Otherwise, just buy a modern center or small bookshelf with a poly midbass and soft dome tweeter and let your Onkyo do its auto eq setup and see how close a match it can get timbrally. Not the end of world if not perfect match.

10-14-18 03:35 PM
Kal Rubinson
Re: HT Center Speaker Matching with Front Speakers

Quote:
wtaylorbasil wrote: View Post
As I have responded to theJman in my post 8. Do I need a full range speaker to match?
Answered in Post #9. I use three identical floor-standing full range speakers across the front for L/C/R and smaller floor standers for surround.
10-14-18 09:00 AM
wtaylorbasil
Re: HT Center Speaker Matching with Front Speakers

Quote:
Kal Rubinson wrote: View Post
I would look for British speakers of the vintage with KEF/Bradford mids/woofers and KEF/Celestion/STC HF drivers.
As I have responded to theJman in my post 8. Do I need a full range speaker to match?
Can you help me understand this philosophy?
Thanks
10-14-18 08:57 AM
Kal Rubinson
Re: HT Center Speaker Matching with Front Speakers

Quote:
theJman wrote: View Post
The OP's original question was about a center that would timbre/voice match with his current speakers. Bass loading is a minor consideration in respect to what he is attempting to achieve.
Yes. I have been saying that, too.

Quote:
wtaylorbasil wrote: View Post
May be I ought to ask a more "fundamental" question. Center speaker handles the speech section and that should be enough with less than 200Hz to may be 2.5KHz. So why do we need a full range speaker.
There is more in the center channel than voice.. Having a speaker with a very limited range (e.g., 200Hz to 2.5KHz) in and of itself will severely limit its abilities to maintain a consistent timbre match across the front.
10-14-18 08:53 AM
wtaylorbasil
Re: HT Center Speaker Matching with Front Speakers

Quote:
theJman wrote: View Post
I suspect you will have quite a challenge to match 40+ year old TL speakers; if the age isn't enough of an obstacle, a TL alignment will certainly be. About the only commercially available speaker I know of that's even close to a transmission line is the Atlantic Technology AT-2, but I don't know how well that would match with your current speakers.

Does your receiver have the ability to create a 'phantom' center? If so, that might be your best option. I personally don't think they work as well as a real center does, but it may be worth considering.
I had a look at the AT-2 and it goes down to very low frequency output.
May be I ought to ask a more "fundamental" question. Center speaker handles the speech section and that should be enough with less than 200Hz to may be 2.5KHz. So why do we need a full range speaker. Once I understand this may be I can move on.
Thanks
10-13-18 10:43 PM
theJman
Re: HT Center Speaker Matching with Front Speakers

The OP's original question was about a center that would timbre/voice match with his current speakers. Bass loading is a minor consideration in respect to what he is attempting to achieve.
10-13-18 10:29 PM
Kal Rubinson
Re: HT Center Speaker Matching with Front Speakers

Quote:
theJman wrote: View Post
So what TL speakers are currently available that could match the voicing of his 40 year old speakers then? I still contend no such animal exists.
PMC for one. However, they will not match the voicing because the voicing has nothing to do with bass loading. I stand by the suggestions in my original reply.
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