Split, 12.05.2026.
SUBJECT: Invitation to submit a bid
The client, the Public Cultural Institution Croatian House Split, is conducting a simple procurement procedure for acoustic treatment of the stage.
In accordance with Article 12, Paragraph 1, Item 1 of the Public Procurement Act (OG 120/16, 114/22), for the procurement of goods and services with an estimated value of up to €26.544,56 excluding VAT and works with an estimated value of up to €66.361,40 excluding VAT, the contracting authority is not obliged to carry out the public procurement procedure prescribed by the Act.
Public institution in culture Croatian Home Split
Split, Tonciceva 1
VAT Number: 74476770642
Mobile/ Tel: 098303010 / +385 91 1111523
Contact person: Slaven Tahirbegović, Technical Manager / Andrea Beader, Business Secretary
E-MAIL: slaven@hdsplit.hr / andrea@hdsplit.hr
04-26
Easy procurement
DESCRIPTION OF THE PROCUREMENT SUBJECT
4.1. SUBJECT OF PROCUREMENT
The subject of a simple procurement is the supply, delivery and installation of acoustic diffuser elements on the ceiling above the stage to reduce flutter echo and improve the acoustic characteristics of the space, while maintaining the existing height of the stage ceiling.
It is necessary to reduce the fluttering echo on the stage without significantly reducing the height of the stage ceiling, which is already very low (312 cm).
Description of works:
In the free space of the ceiling above the stage, it is necessary to mount acoustic elements for sound diffusion/dispersion, the characteristics of which are specified in the table below. The table lists the sound absorption and sound dispersion coefficients of the acoustic elements used in the calculation of the hall acoustics. Deviation from the specified values of more than ±5% in a single frequency band is not allowed, as it would result in noticeable changes in the acoustic situation compared to the designed conditions.
| Frequency (Hz) | 125 | 250 | 500 | 1000 | 2000 | 4000 |
| Sound absorption coefficient | 0,10 | 0,26 | 0,39 | 0,25 | 0,20 | 0,17 |
| Sound scattering coefficient | 0,56 | 0,66 | 0,67 | 0,70 | 0,71 | 0,72 |
Diffuser acoustic elements have standard dimensions of 60 cm x 60 cm and a thickness of 14 cm, are made of high-density EPS material and have a mass of 2,4 kg per element. Given the stated dimensions of the acoustic elements and the shape of the ceiling above the stage, it is recommended to install a grid of 15 x 6 elements with a distance of 10 cm between them, equally spaced from the edge of the walls and the beginning of the stage in order to visually achieve a uniform appearance of the ceiling. Diffuser elements do not need to be installed directly above the steps to the stage, so a total of 86 elements are required.
4.2. ESTIMATED PROCUREMENT VALUE
14.000,00 euros excluding VAT.
The contracting authority reserves the right not to select any bid if the bid prices are above the estimated procurement value.
The contracting authority reserves the right to cancel the simple procurement procedure at any time without giving reasons.
4.3. QUANTITY AND SCOPE OF THE SUBJECT OF PROCUREMENT
The subject of a simple procurement is the supply, delivery and installation of acoustic diffuser elements on the ceiling above the stage to reduce flutter echo and improve the acoustic characteristics of the space, while maintaining the existing height of the stage ceiling.
The bidder must ensure:
4.4. SPECIFICATION
Diffuser acoustic elements must meet the following conditions:
Taking into account the dimensions of the acoustic elements and the shape of the ceiling above the stage, the layout of the grid is foreseen:
Payment will be made based on duly issued e-invoices, within 30 days from the date of receipt of the invoice.
The deadline for the completion of the works is as agreed with the client, and the bidder is obliged to organize the works in such a way as to disrupt the regular use of the space to the smallest extent possible.
The bid price must be expressed in euros.
The bidder is obliged to submit a complete cost estimate with unit prices excluding VAT.
The bid price is written in numbers.
The offer price excluding VAT must include all costs and discounts.
Lowest price.
The offer is made in the Croatian language and Latin script.
The validity period of the offer is 90 days from the expiry of the deadline for submission of offers.
The bid shall be submitted in original paper form in a sealed envelope to the contracting authority's address specified in this invitation to submit bids.
The following must be indicated on the bid envelope:
- name and address of the ordering party,
- name and address of the bidder
- procurement registration number (04-26)
- the name of the procurement subject to which the offer refers: Acoustic treatment of the stage.
- "do not open" sign.
The bidder submits the total price of the bid and, if necessary, a breakdown of the price (e.g. monthly amount) and a bid sheet signed by an authorized person.
The offer is submitted exclusively in written form, via registered mail, to the address of the contracting authority, in a sealed envelope indicating the subject of the procurement.
Bids submitted in any other manner or outside the prescribed deadline will not be considered.
PUBLIC INSTITUTIONS IN CULTURE
CROATIAN HOME SPLIT
TONČIĆEVA 1, SPLIT
The deadline for submitting bids is March 20, 2026.
There will be no public opening of bids.
Electronic submission of bids is not permitted.
