Dayton 12 inch

[ericanderson]

Has anyone done listening comparisons with the following Dayton 12 Woofers?
TIT320C-4
RSS315HF-4
RSS315HO-4

It appears that the TIT320C-4 has a strong following and a higher price that the other two, but some of the parameters and construction characteristics of the others seem superior. It would appear that the final decision would be a listening test. So, I wonder ... has anyone has had the experience?

[daryl]

Re: Dayton 12 inch

Provided Link: Daryl's Speaker Stuff.


A listening comparison would be difficult since your hearing largely depends upon timber making assessments of a single frequency range difficult (although in your mind you believe you are focusing on a given frequency range the reality is different).

The reference series drivers are designed for low distortion and have three Faraday rings in their motor.

The HF version of the RS line has a two layer voice coil and it's ratio Re/Le is nearly 3500 while the HO version has a four layer coil with the ratio Re/Le being nearly 2000.

The HO version has a higher Mms which means you can achieve a given system resonance in a smaller box which will require more power for full output and higher distortion due to the four layer coil modulating the magnet systems flux to greater degree, greater hysteresis from the steel in the motor and greater position dependant modulation of voice coil impedance.

The Titanic on the other hand is designed for high output and it's rated Xmax is nearly 19mm where the RS series rated Xmax is 14mm and 12mm.

The Titanic does have a Faraday ring but it is located in an area where it can't help much.

The Titanics ratio Re/Le is less than 1000 which means the response will want to peak above Ftc and then fall at higher frequencies which means the Titanic can only be used a subwoofer where the RS could be used as woofers also.

Standard box software calculation won't predict the box response of the Titanics very well but will for the RS's since their Le is so low.

[gp4Jesus]

How does the DA RSS315HF-8 figure in to this equation. Interested in it’s FR below ~45hz.

Nominal Diameter	12"
Moving Mass Of Diaphragm (Mmd)	194
Power Handling (RMS)	400 Watts
Power Handling (MAX)	700 Watts
Impedance	8Ω
Frequency Response	25 to 1,500Hz
Sensitivity	85.7dB 2.83V/1m
Voice Coil Diameter	2.58"

Resonant Frequency (Fs)	22.2Hz
DC Resistance (Re)	6.5Ω
Voice Coil Inductance (Le)	1.56mH
Mechanical Q (Qms)	2.5
Electromagnetic Q (Qes)	0.54
Total Q (Qts)	0.45
Compliance Equivalent Volume (Vas)	3.43ft³
Mechanical Compliance of Suspension (Cms)	0.27mm/N
BL Product (BL)	18T·m
Maximum Linear Excursion (Xmax)	14.3mm
Surface Area of Cone (Sd)	506.7cm²

Cone Material	Aluminum
Surround Material	Rubber
Voice Coil Wire Material	Copper
Voice Coil Former	Aluminum
Basket / Frame Material	Steel
Magnet Material	Ferrite

Overall Outside Diameter	12.36"
Baffle Cutout Diameter	11.1"
Depth	5.75"
# Mounting Holes	8

Sealed Volume	1.54ft³
Sealed F3	40Hz
Vented Volume	4.63ft³
Vented F3

also your thoughts for a driver serving 120hz and below for LFE duty? Probably the same driver?

big thanks for your expertise. Tony

[billfitzmaurice]

Why are you tagging on to a 14 year old zombie thread? The answer to your question is you software model it. That's how you see the capabilities of any low frequency driver.

[fpitas]

As daryl said, the HF series has very low inductance, so 120Hz should not be a problem. As Bill said, modeling software is your friend to see the LF response. I'd guess it will do fine below 45Hz.

[Chris Roemer]

Isn't the current verion HF"A"-8 ??

[fpitas]

Here are bone-simple calculators:

https://www.ajdesigner.com/speaker/ajsealed.php

https://www.ajdesigner.com/speaker/ajvented.php

WinISD is better but needs a little more effort.