Low budget 12″ Hybrid

LBH-112

12″ hybrid subwoofer from Jobst-Audio, now JB-Sub112h from the low-cost B series – classification and sources; dimensions only from the designer.

Community design Last checked: 14 September 2026 What does this mean?

Design from the DIY community; there are no manufacturer or designer performance data. Values come from Tier B and C sources.

Compare with other plans

Share via …

Specifications

Every value with its provenance. If a value is missing from the source, it reads “not available”.

Drivers: not available not specified – see community mentions below
Enclosure type: Hybrid
Low-frequency extension: not available
Sensitivity: not available
Max. SPL: not available
Power handling: not available
Impedance: not available
Dimensions (H × W × D): not available
Volume: not available
Tuning frequency: not available
Weight: not available
Recommended high-pass: not available

Description

In brief

A 12-inch hybrid subwoofer from Jobst-Audio’s beginner series. The official plan page is currently offline, and the terms of use only permit linking.

The LBH-112 is a 12-inch hybrid subwoofer by Jobst-Audio (B. Jobst). It started as a forum project – the release thread in the PA-Forum is called “LBT-1121 & LBH-112 – Fertig zum nachbauen” – and is now called JB-Sub112h. Under this name it belongs to the B series, which Jobst-Audio describes as “affordable beginner kits for private and small events”.

Why there are no dimensions here

The official plan page on jobst-audio.de could not be reached on 13 September 2026; according to the operator, the website is currently being revised. The Jobst-Audio terms of use permit plans, dimensions, lists and measurements only for your own build and prohibit publishing them on other sites. Linking is expressly permitted. We therefore only show what the project is and refer to the sources.

What is known from the forum

In 2017, a user names the Eminence Delta 12LFA as the driver recommended in the plan and relays a statement by Jobst: the driver should have a Qts above 0.3 and work in an 80-litre bass reflex enclosure.
A build report from 2022 fits the enclosure with the the box 12-280/8-A.

These are statements by users, not information from the designer. If you want to build the LBH-112, it is best to ask for the current plan directly from Jobst-Audio or in the Lautsprecherforum.eu.

There is no LBH-115

We did not find a 15-inch counterpart named LBH-115. The 15-inch project from the same Jobst-Audio naming series was called LBB-115 and is now called JB-Sub15 – according to the designer an enclosure with a floor port, not a hybrid.

Why in “Low-budget subs”?

Jobst-Audio now lists the LBH-112 as JB-Sub112h in the B series; the link to the official plan is under “b-serie”. The manufacturer describes the B series as low-cost beginner kits.

Original: Günstige Einsteiger-Bausätze für private und kleine Veranstaltungen

Evidence: Lautsprecher Bausätze – B-Serie

All low-budget subs

Drivers

The plan does not specify a driver.

Mentioned in the community – not verified

These drivers are named by forum users. Whether they work in the enclosure has not been confirmed by simulation or measurement.

Eminence Delta 12LFA – According to a user, the driver recommended in the plan; Jobst requires a Qts above 0.3 (reported statement). (Tier C · community)
the box 12-280/8-A – Used in the build report with video (2022). (Tier C · community)

Enclosure

Enclosure type: Hybrid · How does it work?
Shape: not stated
Ports: not stated
Material: not stated

Build plan

We link to the original plan and do not host other people’s drawings.

Plan access: Not stated

Pros and cons

Pros

Well-known beginner project with many build reports
According to the manufacturer part of a low-cost beginner series

Cons

Official plan page unavailable on the access date
No documented performance data publicly available
Driver details only from the forum

Sources

Tier B · secondary source

Thema für JL-Sub15N, JB-Sub15 (N/Pro/AK/18s)

Jobsti · Lautsprecherforum.eu · 9 June 2011 (Date of the forum post) · accessed on 13 September 2026

Post by the designer: “Info/thread for LBH-112 (JB-Sub112h) removed – for current data, see our website” (translated). Documents the renaming.
Tier A · primary source

Lautsprecher Bausätze – B-Serie

Jobst-Audio · accessed on 13 September 2026

Shop category of the B series with the description “Low-cost beginner kits for private and small events” (translated). The B series subwoofers were not listed there on the day of retrieval.
Tier A · primary source

JB-Sat12 – Nachbauunterlagen, Abschnitt „Fair-Use & Urheberrecht“ (PDF)

Jobst-Audio · August 2024 · accessed on 13 September 2026

Jobst-Audio’s terms of use: plans, drawings, lists, descriptions and measurements may not be published on other websites without written permission; linking is expressly permitted.
Tier C · community

LBT-1121 & LBH-112 – Fertig zum nachbauen

Jobsti · PA-Forum · 23 July 2006 (Date of the forum post) · accessed on 13 September 2026

Release thread from 2006. The first post contains the data for the LBT-1121 top; for the LBH-112 it refers to a post in the former forum party-pa.de, which can no longer be reached.
Tier C · community

[YT] Komplettanleitung für JB-Sub112h Hybridsubwoofer

DJServiceFrankfurt · Lautsprecherforum.eu · 16 March 2022 (Date of the forum post) · accessed on 13 September 2026

A user’s build report with video and materials list. The linked official build plan (jobst-audio.de/public-address/b-serie/…) could not be reached on the day of retrieval.
Tier C · community

JB-sub112h (LBH-112) mit hochwertigem Chassie

lanzpanz · Lautsprecherforum.eu · 27 January 2017 (Date of the forum post) · accessed on 13 September 2026

User question about more powerful drivers; names the driver recommended in the plan and relays a statement by Jobst on suitable drivers.

Usage rights of the plan: Linking only – copying not permitted. Added on 14 September 2026, last updated on 14 September 2026.