bawward
Grip
Hey there - new to the forum but I've lurked for over a decade.
Background:
I bought a Mach 5 Audio MJ-18 almost ten years ago for an IB install in my wagon (seen at the bottom of this post)
Now, I'm moving the MJ-18 into the house - my reliable Polk Audio PSW505 had it's amp crash. I have a lot of experience with wood, fiberglass, etc - but a wise man knows when to ask for advice!
The Room:
The media space is about 15'-0" x 11'-6", 8' ceilings (1380 cu ft.) (See image below) I really don't know what the room gain is like, or at what frequencies. Subwoofer location shown - but I can adjust if it would help. I love the idea of IB, but at this time it just won't work - so I'm building a box!
The Purpose:
This will be in a room where 90% HT use, 10% music. As such, I'm planning on going ported. I'd like to tune it between 15-20hrz (flexible on this)
Sound Profile Desired:
SPL desires slightly outweighs SQ, however I have a feeling there's a nice 'middle ground'.
--------------------
Driver (Already Purchased)
Mach 5 Audio MJ-18 - 4ohm
Fs = 28 Hz
Re = 3.2 Ohms
Qes = 0.34
Qms = 4.99
Qts = 0.31
Mms = 229 grams
Rms = 8.1 kg/s
Cms = 0.14 mm/N
VAS = 208.4 litres
Sd = 1029.2 cm2
Xmax = 15 mm
Power Handling: 600 Watts
SPL (2.83v/1m): 93.4 db
Amp:
iNuke DSP1000
General concern - being able to get information below 20hrz to the sub - this amp has a high-pass at around 20hrz. I believe the iNuke DSP's can be adjusted to allow for this.
----------------
Questions:
Box: (Please provide input)
-I can go as large as I need to. roughly rectangular (equal depth/height preferable) - I'm assuming min. 5 cu ft, but thinking 7 cu ft might be better?
-Could be down-fire / front - doesn't matter (and I know this is arbitrary)
-Slot or 3"/4" flared tube
Possible / Recommended Box Sizes (this is from Mach 5 site):
Sealed: 80 litres (2.8 cu. ft.)
Ported: 128 litres (4.5 cu. ft.) 30Hz tuning
**EBS: 250 litres (8.8 cu. ft.) 18Hz tuning** (This one is the most interesting to me)
Background:
I bought a Mach 5 Audio MJ-18 almost ten years ago for an IB install in my wagon (seen at the bottom of this post)
Now, I'm moving the MJ-18 into the house - my reliable Polk Audio PSW505 had it's amp crash. I have a lot of experience with wood, fiberglass, etc - but a wise man knows when to ask for advice!
The Room:
The media space is about 15'-0" x 11'-6", 8' ceilings (1380 cu ft.) (See image below) I really don't know what the room gain is like, or at what frequencies. Subwoofer location shown - but I can adjust if it would help. I love the idea of IB, but at this time it just won't work - so I'm building a box!
The Purpose:
This will be in a room where 90% HT use, 10% music. As such, I'm planning on going ported. I'd like to tune it between 15-20hrz (flexible on this)
Sound Profile Desired:
SPL desires slightly outweighs SQ, however I have a feeling there's a nice 'middle ground'.
--------------------
Driver (Already Purchased)
Mach 5 Audio MJ-18 - 4ohm
Fs = 28 Hz
Re = 3.2 Ohms
Qes = 0.34
Qms = 4.99
Qts = 0.31
Mms = 229 grams
Rms = 8.1 kg/s
Cms = 0.14 mm/N
VAS = 208.4 litres
Sd = 1029.2 cm2
Xmax = 15 mm
Power Handling: 600 Watts
SPL (2.83v/1m): 93.4 db
Amp:
iNuke DSP1000
General concern - being able to get information below 20hrz to the sub - this amp has a high-pass at around 20hrz. I believe the iNuke DSP's can be adjusted to allow for this.
----------------
Questions:
Box: (Please provide input)
-I can go as large as I need to. roughly rectangular (equal depth/height preferable) - I'm assuming min. 5 cu ft, but thinking 7 cu ft might be better?
-Could be down-fire / front - doesn't matter (and I know this is arbitrary)
-Slot or 3"/4" flared tube
Possible / Recommended Box Sizes (this is from Mach 5 site):
Sealed: 80 litres (2.8 cu. ft.)
Ported: 128 litres (4.5 cu. ft.) 30Hz tuning
**EBS: 250 litres (8.8 cu. ft.) 18Hz tuning** (This one is the most interesting to me)