Do you use the test tones and measure to circa 85db? As my other speakers?
Seems low when used on the sub and the meter appears to be in the Bermuda Triangle when it comes to using it for sub test tones.

(Digital meter C slow)

__________________
McIntosh 501's, Sonus Faber Elipsa speakers,McIntosh LS 360's Full Surround Speakers in Home Theater. (2) MR85, MCD201, C46 Pre, (2) JL F113 Fathom Subs, (1) JL F112, MA2275 Int Amp, Sonus Faber Cremona Auditor Speakers, Project Turntable. Blackbird Cart, Clearaudio Concept table, MC, Oppo 95 120 inch screen and an Epson 1080UB Projector. Nothing better then Pipes/Cigars, and a Great movie with the JL subs Pounding. MAC1700 Receiver and ML-1C speakers

There are correction tables for the Radio Shack meters on the internet. Apparently, low frequency measurements with these meters come out low (amount of error dependent on frequency of test tone).

Here's correction values for one model of Radio Shack meter:


LF corrections for Radio Shack 33-2055 meter
These are for the current digital meter used as a microphone. First number is Hz, second is error.

10 -5.66
11 -5.25
12 -4.66
13 -4.20
14 -3.80
15 -3.50
16 -3.30
17 -3.10
18 -2.90
19 -2.70
20 -2.50
21 -2.30
22 -2.10
23 -1.95
24 -1.80
25 -1.60
26 -1.40
27 -1.15
28 -1.00
29 -0.90
30 -0.75
31 -0.65
32 -0.55
33 -0.44
34 -0.33
35 -0.22
36 -0.11
37 0.00


So, you can see that 20 Hz is actually 2.5 dB lower than the reading on the meter. You can easily correct this in your setup.

I hope this helps. There are tables available for the other model Radio Shack meters as well if you search.

Lee

RBFC.......Welcome to Audio Aficionado.

__________________
Dan


Living Room System: McIntosh C2300, MC601 (2), MCD1100, MS750, MR85, Sony DAT 60ES, Nakamichi BX-300, Micro Seiki DD-40, Ortofon 2M Black, Sonos ZP90, Oppo BDP-83SE Blu-ray, PMC EB1i, Fathom f113 w/ Sound Anchor stand, Power Plant Premier (2), PS Audio Soloist Premier SE (3), Rollerblock Jr.'s, Wireworld Silver Eclipse IC's & PC's, Kimber 8TC with WBT Solid Silver Angled Locking Banana Connectors.
Studio System: McIntosh C1000C/P, MC2301 (2), MCD1100, MR88, Michell Gyro SE w/SME 309/Ortofon Cadenza Black, Sonos ZP90, PS Audio Power Plant Premier, PS Audio Soloist Premier SE, Sonus Faber Amati Anniversario, Rollerblock Jr.'s, Wireword Silver Eclipse IC's & PC's, Wireworld Silver Eclipse speaker cable.
Studio Home Theater System: McIntosh MX120, MC452, Oppo BDP-95 Blu-ray, PS Audio Soloist Premier SE, JBL LSR-6332 (2), JBL LSR-6328P (3), McIntosh XLS112 (2), Sony 52XBR9, Tributaries Silver IC's, Wireworld PC's.
Vintage: McIntosh MA5100, MR74 tuner, JVC XL-Z1050 K2 CD player, Wyred 4 Sound DAC2, Tandberg 3008A and 3026A, JBL4312A , McIntosh 4300V for deck speakers.

Thanks for the welcome.

Please note when setting up two JL F113s (my goal, currently have 1 of them), there are significant differences if you configure them as master/slave or two masters. I'll be back online soon and offer some thoughts as to setup.

Thanks,

Lee

As master/slave, the ARO will adjust both subs together. As dual masters, you'll have to run ARO on each, then set overall volumes for even response. Note that the interaction between the two subs may cause other frequency response irregularities, so another round of SPL meter tests can help.

Lee

Welcome RBFC

Thanks for the tips.

__________________
AMP's: D'Agostino Momentum's
Pre Amp: Mcintosh C-1000 & C-1000P
Sources: McIntosh MCD-1100 & MS-300, Olive 4HD, SonoS, Pro-Ject 6 PerspeX
Speakers: MBL 111F
Cables: Transparent Ultra MM2 & Reference MM2 & Powerlink MM2x