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 Post subject: 36 IN Tuba HT
PostPosted: Fri Oct 20, 2017 4:14 pm 
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I am building a 36 inch wide Tuba Ht using a Dayton Audio|Model: RSS390HF-4|Part # 295-468. (15 inch driver from Parts Express.)
I am considering out of shear ignorance a Dayton Audio SPA250 250 Watt Subwoofer Plate Amplifier.
but i notice this amp has a low setting of 40 HZ. I need 15 to 25 .
How does this work and can you recommend an Amp that will deliver a 15 to 25 HZ signal with out wasting any of the amps resources/power?
Thanks


Last edited by sinbad 101 on Fri Oct 20, 2017 6:01 pm, edited 1 time in total.

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 Post subject: Re: 36 IN Tuba HT
PostPosted: Fri Oct 20, 2017 4:23 pm 
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Location: New Braunfels, TX
sinbad 101 wrote:

Can you recommend an Amp that will deliver a 15 to 25 HZ signal with out wasting any of the amps resources/power?


What does that mean? If the amp is powering the speaker, then the power is not wasted......

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6 - T39 4-25" 2-22" 3012LF
4 - OT12 2512 Melded/NSD2005
1 - T24
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."


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 Post subject: Re: 36 IN Tuba HT
PostPosted: Fri Oct 20, 2017 6:06 pm 
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I am referring to a reference that Bill made in one of his testimonials that the TubaHt only required A 200 what Amp and that"anything more was a waste of money." I would just like to confirm that. I am asking which amp he was referring to.
Thanks


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 Post subject: Re: 36 IN Tuba HT
PostPosted: Sat Oct 21, 2017 6:17 am 
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Location: New Braunfels, TX
sinbad 101 wrote:
I am referring to a reference that Bill made in one of his testimonials that the TubaHt only required A 200 what Amp and that"anything more was a waste of money." I would just like to confirm that. I am asking which amp he was referring to.
Thanks


He wasn't referring to a particular brand, just one with that amount of output. A lot of people use the Bash plate amps for home theater and build a little box for them.

_________________

6 - T39 4-25" 2-22" 3012LF
4 - OT12 2512 Melded/NSD2005
1 - T24
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."


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 Post subject: Re: 36 IN Tuba HT
PostPosted: Sat Oct 21, 2017 12:22 pm 
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Location: Tucson, AZ
sinbad 101 wrote:
can you recommend an Amp that will deliver a 15 to 25 HZ signal with out wasting any of the amps resources/power?
PWR-ICE250 with back box so long as you have a matching computer in order to set the filters.

Otherwise the Dayton SA1000

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 Post subject: Re: 36 IN Tuba HT
PostPosted: Mon Oct 23, 2017 10:00 pm 
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Posts: 4
Thanks for your replies it is a great help. The next bit is a bit confusing my feelings won't be hurt if you toss your hands up in the air, pitch your mouse across the room and storm out for a coffee at the local Starbucks.... on mee
Neither of the Amps mentioned actually advertise a 15 HZ capability. How is it the tuba ht can produce 15 Hz.? I must be reading the Amp specs wrong
Again Thanks for your help


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 Post subject: Re: 36 IN Tuba HT
PostPosted: Mon Oct 23, 2017 10:50 pm 
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Location: New Braunfels, TX
sinbad 101 wrote:
Neither of the Amps mentioned actually advertise a 15 HZ capability. How is it the tuba ht can produce 15 Hz.


What are you seeing that makes you think it can't handle 15hz?

I looked at both spec sheets and didn't see anything like that....

_________________

6 - T39 4-25" 2-22" 3012LF
4 - OT12 2512 Melded/NSD2005
1 - T24
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."


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 Post subject: Re: 36 IN Tuba HT
PostPosted: Wed Oct 25, 2017 3:04 pm 
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Location: Kankakee, IL
https://www.parts-express.com/pedocs/sp ... -sheet.pdf

I wonder if he means this:

"
450W @ 1% THD+N, 20Hz – 20kHz"

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2 DR250s, 2 27" Lab15 T-60s, 2 30" Neo Titan 39s, 1 Autotuba...and looking for more!


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 Post subject: Re: 36 IN Tuba HT
PostPosted: Wed Oct 25, 2017 3:41 pm 
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Location: New Braunfels, TX
Rich4349 wrote:
https://www.parts-express.com/pedocs/specs/minidsp-icepower-125asx2-data-sheet.pdf

I wonder if he means this:

"
450W @ 1% THD+N, 20Hz – 20kHz"


I kinda' thought that, but I didn't see that spec anywhere. If that's the case, those are just ratings for that bandwidth.....doesn't mean it won't reproduce above or below that number.

_________________

6 - T39 4-25" 2-22" 3012LF
4 - OT12 2512 Melded/NSD2005
1 - T24
2 - XF210


"A system with a few knobs set up by someone who knows what they are doing is always better than one with a lot of knobs set up by someone who doesn't."


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 Post subject: Re: 36 IN Tuba HT
PostPosted: Fri Oct 27, 2017 7:46 pm 
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Joined: Thu Sep 28, 2017 6:38 pm
Posts: 4
Hi ,Thanks for the replies.
The speaker i am using in Bill's tuba plan is a Dayton Audio RSS390HF-4 15" Reference HF Subwoofer 4 Ohm

Product Specifications for speaker
Nominal Diameter15"Power Handling (RMS)500 Watts
Power Handling (max)1000 WattsImpedance4 ohms
Frequency Response18 to 800 HzSensitivity91.2 dB 2.83V/1m
Voice Coil Diameter2.5"Magnet Weight150 oz.
Thiele-Small Parameters
Resonant Frequency (Fs)19.5 HzDC Resistance (Re)3 ohms
Voice Coil Inductance (Le)0.92 mHMechanical Q (Qms)3.02
Electromagnetic Q (Qes)0.50Total Q (Qts)0.43
Compliance Equivalent Volume (Vas)7.49 ft.³Mechanical Compliance of Suspension (Cms)0.22 mm/N
BL Product (BL)15 TmDiaphragm Mass Inc. Airload (Mms)306g
Maximum Linear Excursion (Xmax)14 mmSurface Area of Cone (Sd)829.6 cm²

the amps suggested are;
SPA250 250W Subwoofer Plate Amplifier with the following stats.
Variable low-pass filter at 24 dB/octave attenuation from 40 Hz ~ 180 Hz
• Switchable phase 0° (NOR) or 180° (REV)
• Variable gain MIN/MAX input voltage dependent
• Speaker level high-pass outputs 6 dB/octave at approximately 90 Hz @ 8 ohms, 180 Hz @ 4 ohms (i.e. 220 uF electrolytic capacitor)
• Line-level full bandwidth (10 Hz- 20 kHz) outputs/throughputs for adding or "daisy chaining" additional amplifiers
• Subsonic filter 12 dB/octave high-pass filter centered at 20 Hz
• Damping factor at rated power: 114 @ 100 Hz
Or
Daytona SA1000
I did'nt seem to get any idea of what this amp does from the spec sheet

What i would ask from experienced users like your selves is :
A) even though the speaker rates at 17 Hz will it produce
15 hz?
B) should the speaker be prepared to preform to 15hz will the amp actually send a 15 hz signal to it?
Thanks for your help
L


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 Post subject: Re: 36 IN Tuba HT
PostPosted: Mon Nov 06, 2017 5:58 pm 
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Joined: Thu Feb 28, 2013 9:49 pm
Posts: 121
Location: Gilbert, AZ, USA
sinbad 101 wrote:
What i would ask from experienced users like your selves is :
A) even though the speaker rates at 17 Hz will it produce
15 hz?
B) should the speaker be prepared to preform to 15hz will the amp actually send a 15 hz signal to it?
Thanks for your help
L


You do know that you can't hear 15 Hz right? The human ear, except for laboratory settings, cuts off at roughly 20 Hz for most people.

The amp will pass through whatever signal you send to it. Listed range is 10 Hz- 20 kHz.

What music are you playing, or movie are you watching, that you need to go that low? Have you measured it to know how low you actually need to go?

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Current HT Setup
TV - Vizio e701i-a3
Denon AVR-X2000
9 driver Curved SLA center channel
Rebuilt Bose 4000 L/R
Single 4" rears
Table Tuba w/ MCM 55-2421


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