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FLOWTHEORY SD / CB7 AUDIO

CB7 Speaker 3D Fitment Center

Read your speaker's dimension drawing, see how it sits in the CB7 door in 3D, then send it to us for a fitment review before you order.

Start with your speaker's drawing Request Fitment Review
  1. 1Read your speaker's drawing
  2. 2See it in your door
  3. 3Send for review

Step 1 / Read your speaker's drawing

Find these six numbers

Most speakers come with a dimension drawing on the box, in the manual or on the maker's product page. Every height and depth is measured from the same line: the underside of the mounting flange, where the speaker sits on the adapter.

Speaker front and side views with the six measurements numbered Front view: 4 is the tweeter diameter and 6 the cutout diameter. Side view: 1 is the rear depth from the flange underside to the deepest rear point, 2 the front height of the cone or frame, 3 the height of a raised tweeter, and 5 the magnet diameter. FRONT Flange underside SIDE 1 2 3 4 5 6
  1. Rear depth Box: "mounting depth", "top-mount depth"

    Down to the deepest point at the back: magnet, vent or terminals.

  2. Front height Box: "top-mount height", "height above mounting surface"

    Up to the top of the cone, surround, grille or frame. Leave out a raised tweeter.

  3. Tweeter height

    Up to the top of a raised or pivoting tweeter. Leave blank if it sits flush.

  4. Tweeter diameter Box: "tweeter size"

    Across the tweeter housing. A "1 in" tweeter is about 25 mm.

  5. Magnet diameter

    Across the widest part of the magnet. Needed with weather cups.

  6. Cutout diameter Box: "cutout", "mounting hole"

    The hole the basket drops into. We size the adapter's opening to it.

Reading a real drawing

Makers label their drawings differently. Here's how three common layouts match the six numbers. Grey is what the drawing prints; a blue circle shows which field that number goes in. Each example needs a different adapter, so you can see how a few millimetres change the fit.

Height above and below the flangeCommon on woofer and component drawings.
Side view of a woofer drawing 52 max. below the flange is the rear depth (1), 6 above the flange is the front height (2), and Ø142.5 max. across the basket just under the flange is the cutout (6). Ø160 max. is the outer frame and is not needed. 52 max. 6 Ø160 max. (skip) Ø142.5 max. 1 2 6
Rear depth
52
Front height
6
Cutout
142.5

Best fit: 12 mm adapter

  • 12 mm9 mm · Room
  • 17 mm5 mm · Room
  • 22 mm0 mm · Tight

A shallow speaker fits the thinnest adapter. The thicker ones push it closer to the door card. Skip the outer frame (Ø160). A screw circle such as "4 × Ø5 holes on Ø156" helps us choose the adapter's opening, so mention it in your notes.

Mounting depth and overall heightCommon on coaxial drawings with a raised tweeter.
Side view of a coaxial speaker drawing with a raised tweeter Mounting depth 58 is the rear depth (1). The tweeter is the tallest part, so overall 64 minus 58 gives the tweeter height, 6 (3). 128 across the basket under the flange is the cutout (6). 152 is the outer frame and is not needed. Mounting depth 58 Overall 64 152 (skip) 128 1 3 6
Rear depth
58
Tweeter height
6
Overall 64 − mounting depth 58
Cutout
128

Best fit: 17 mm adapter

  • 12 mm3 mm · Tight
  • 17 mm5 mm · Room
  • 22 mm0 mm · Tight

Deeper at the back, so 12 mm is tight there. 22 mm would push the tweeter up to the door card. When the tweeter is the tallest part, overall − mounting depth is the tweeter height (3), not the front height. Skip the outer frame (152).

Magnet size, with a weather cupCommon on component sets and subwoofer-style midbass drawings.
Side view of a deep speaker drawing with the magnet size Mounting depth 62 is the rear depth (1). Ø90 across the magnet is the magnet size (5), needed with a weather cup. Ø144 across the basket under the flange is the cutout (6). Mounting depth 62 Ø90 Ø144 1 5 6
Rear depth
62
Magnet
90
Cutout
144

Best fit with a weather cup: 22 mm adapter

  • 12 mm4 mm overlap · Interferes
  • 17 mm1 mm · Tight
  • 22 mm6 mm · Room

A weather cup is shallower than the door (46 mm inside for magnets up to 94 mm), so a deep speaker in a cup needs the thickest adapter. The magnet size tells us which cup step it sits in.

Step 2 / See it in your door

Enter the numbers, then compare adapters

The fields are numbered like the drawing above. Pick a thickness and turn the weather cup on or off; the clearances and the 3D view update together.

Rotate the adapter, weather cup and speaker in 3D. About 700 KB loads when you open it.

Adapter thickness

Find your speakerPick it from our library to fill the numbers below, or enter them from your drawing.

Your speaker (example values)
Measure in

Clearance by thickness

A visual guide, not a fit guarantee. Basket shape, terminals, magnet position and mounting holes still need a fitment review before you order.
CB7 door and weather cup measurements behind the 3D view
Mounting surface to window glass, no weather cup
49 mm
Mounting surface to door card
28 mm
Weather cup depth for magnets up to 94 mm
46 mm
Weather cup depth for magnets 94–108 mm (upper step)
40 mm
Weather cup flange to bottom
47 mm

Measured on one owner-tested CB7 front door. Magnets over 108 mm need a custom review. These are starting points for choosing a thickness, not a fit guarantee.

Step 3 / Send for review

Tell us about your speakers

Send your exact speaker model and CB7 body style. Use "Send these with my review request" in the 3D view to attach your numbers, or paste a link to the speaker's drawing below.

Need help with your order or fitment?

For questions about orders, shipping, returns, or custom 3D-printed parts, use the form or email us at support@flowtheorysd.com

We aim to respond within 2 business days.

This is a free inquiry, not an order or a fitment approval. Do not include private customer photos or sensitive personal information.

Fields marked * are required. Your speaker model helps us assess a specific setup; advertised size alone is not enough.

This is your preference, not a fitment approval or order.

Not in our speaker list? We'll add it from your measurements, so the next person with the same speaker can pick it.

We reply within 2 business days.

This contact form sends a message to FlowTheory SD. It does not add a speaker to the public compatibility database automatically.

Common questions

CB7 speaker fitment FAQ

Will 6.5-inch speakers fit a CB7 front door?

It depends on the speaker, not the size label. Two 6.5-inch speakers can differ in depth, basket shape and mounting holes. Measure the rear depth and front height and check them in the clearance calculator, or send us the exact model for a fitment review.

Do I need weather cups?

They are optional. They help keep water inside the door off the back of the speaker. If you use them, check the magnet diameter: up to 94 mm uses the 46 mm cup depth, and up to 108 mm uses the 40 mm upper step. Wider magnets need a custom review.

Which adapter thickness should I choose?

A thicker adapter gives more room behind the speaker and less in front. Pick the thinnest one that leaves room behind the speaker, then confirm the front still clears the door card. Without weather cups, room behind is 49 + thickness − rear depth, and room in front is 28 − thickness − front height.

Are screws included?

The adapters reuse your car's original door screws, and matching door-side spacers are included. Replacement screws are not supplied.

What are the adapters made of?

Each adapter is a single piece of black PETG, sold as a pair and made to order in San Diego.

Do weather cups come with the adapters?

No. The weather cups are a separate product, sold as a pair.